Gait & posture最新文献_第2页

The investigation of nonlinear variability underlying postural control in the injure-limb in individuals with and without chronic ankle instability

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-02-01 DOI: 10.1016/j.gaitpost.2025.01.024

Yuki A. Sugimoto , Patrick O. McKeon , Christopher K. Rhea , Carl G. Mattacola , Scott E. Ross

Background

Less flexible and adaptable sensorimotor systems associated with Chronic Ankle Instability (CAI) limit the detection of relevant sensory feedback information, resulting in decreased movement variability. Consequently, when faced with challenging environmental constraints, particularly with conditions that manipulate sensory feedback, individuals with CAI may become more prone to repetitive ankle sprains. This study aimed to investigate the neural control underlying postural control in the injured-limb during increased environmental constraints with sensory feedback manipulations in individuals with and without CAI, respectively.

Methods

Forty-two individuals with and without CAI participated in the study and completed the sensory organization test (SOT). The SOT assesses the ability to integrate primary sensory feedback across six conditions that manipulate somatosensory and visual feedback with a combination of a sway-referenced support surface and visual surroundings. The nonlinear method of sample entropy (SampEN) was used to quantify the neural control underlying postural control. A one-way ANOVA examined group differences in neural control during the SOT conditions while standing on the injured-limb.

Results

Individuals with CAI demonstrated significantly lower SampEN while maintaining posture in conditions where they were forced to rely exclusively on vestibular feedback in the injured-limb compared to healthy controls (P < 0.05).

Conclusions

Individuals with CAI did not demonstrate decreased movement variability (neural control) in most of the six SOT conditions. However, the CAI group exhibited decreased movement variability, specifically when they had to rely on vestibular feedback while maintaining posture in the injured-limb compared to healthy controls. Future studies should investigate how manipulation of vestibular feedback affects movement variability with gait in individuals with CAI.

{"title":"The investigation of nonlinear variability underlying postural control in the injure-limb in individuals with and without chronic ankle instability","authors":"Yuki A. Sugimoto , Patrick O. McKeon , Christopher K. Rhea , Carl G. Mattacola , Scott E. Ross","doi":"10.1016/j.gaitpost.2025.01.024","DOIUrl":"10.1016/j.gaitpost.2025.01.024","url":null,"abstract":"<div><h3>Background</h3><div>Less flexible and adaptable sensorimotor systems associated with Chronic Ankle Instability (CAI) limit the detection of relevant sensory feedback information, resulting in decreased movement variability. Consequently, when faced with challenging environmental constraints, particularly with conditions that manipulate sensory feedback, individuals with CAI may become more prone to repetitive ankle sprains. This study aimed to investigate the neural control underlying postural control in the injured-limb during increased environmental constraints with sensory feedback manipulations in individuals with and without CAI, respectively.</div></div><div><h3>Methods</h3><div>Forty-two individuals with and without CAI participated in the study and completed the sensory organization test (SOT). The SOT assesses the ability to integrate primary sensory feedback across six conditions that manipulate somatosensory and visual feedback with a combination of a sway-referenced support surface and visual surroundings. The nonlinear method of sample entropy (SampEN) was used to quantify the neural control underlying postural control. A one-way ANOVA examined group differences in neural control during the SOT conditions while standing on the injured-limb.</div></div><div><h3>Results</h3><div>Individuals with CAI demonstrated significantly lower SampEN while maintaining posture in conditions where they were forced to rely exclusively on vestibular feedback in the injured-limb compared to healthy controls (P < 0.05).</div></div><div><h3>Conclusions</h3><div>Individuals with CAI did not demonstrate decreased movement variability (neural control) in most of the six SOT conditions. However, the CAI group exhibited decreased movement variability, specifically when they had to rely on vestibular feedback while maintaining posture in the injured-limb compared to healthy controls. Future studies should investigate how manipulation of vestibular feedback affects movement variability with gait in individuals with CAI.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"118 ","pages":"Pages 69-74"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orthotic bracing to treat equinus in children with spastic cerebral palsy: Recorded compliance and impact of wearing time

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-30 DOI: 10.1016/j.gaitpost.2025.01.034

Claudia Oestreich , Harald Böhm , Matthias Hösl , Leonhard Döderlein , Daniela Lewens , Chakravarthy U. Dussa , Renate Oberhoffer-Fritz

Aim

Spastic cerebral palsy (SCP) often results in "pes equinus," managed with ankle-foot orthoses (AFOs). Yet, little is known about actual wearing time and the minimum duration for improvement. This study explores orthotic compliance, examining its impact on clinical and gait parameters. The hypothesis anticipates a compliance rate below 50 %, suggesting AFOs worn for over 6 hours enhance ankle dorsiflexion.

Method

In a clinically prospective study, SCP children (ages 5 – 15 years) with equinus underwent gait analysis at recruitment and three months later. Wearing time, measured by sensors, categorised participants into compliant (≥6 hours) and non-compliant (<6 hours) groups.

Results

Data were obtained for 32 participants (21 males, 11 females; mean age 10 years 7 months [SD 3 years]). Among 32 participants, 47 % wore AFOs over 6 hours, showing significant ankle dorsiflexion improvement. Thigh shell wearing time was shorter; only two exceeded 6 hours during the day.

Interpretation

Confirming our hypothesis, compliance was < 50 %, yet AFOs over 6 hours improved ankle dorsiflexion. The study revealed minimal AFO daytime use and thigh shell acceptance. Wearing time significantly impacted equinus deformity, underscoring the need to identify factors influencing compliance for effective measures to extend usage.

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引用次数: 0

Preoperative gait pattern as predictor of gait changes following selective dorsal rhizotomy

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-30 DOI: 10.1016/j.gaitpost.2025.01.017

Liza M.M. van Dijk , Kirsten Veerkamp , Marjolein M. van der Krogt , K. Mariam Slot , Annemieke I. Buizer

Background

Selective dorsal rhizotomy (SDR) can improve gait in children with spastic paresis. However, outcomes vary, and selecting individuals who will benefit from the procedure remains challenging. How pre-SDR gait pattern predicts post-SDR gait has not previously been investigated.

Research question

This study aims to compare how different gait patterns change after SDR to gain insight into the potential relevance of gait patterns as a selection criterion for SDR.

Methods

Kinematic and kinetic data of nineteen children with bilateral spastic paresis due to cerebral palsy or hereditary spastic paraplegia, with 3D gait analysis before and two years after SDR, were extracted from an in-hospital database. A cluster analysis was performed to distinguish different gait patterns based on sagittal hip, knee and ankle angles pre-SDR. Deviations from typical gait per leg (38 legs) pre- and post-SDR were quantified with the Gait Profile Score (GPS), calculated for joint angles, moments, and powers. GPS was compared pre- and post-SDR per gait pattern, and pre-post differences were compared between gait patterns.

Results

Three distinct pre-SDR gait patterns (GPs) were identified using cluster analysis, with GP1 characterized by increased knee flexion (18 legs), GP2 by increased ankle plantarflexion (14 legs), and GP3 by increased knee flexion and increased ankle plantarflexion (6 legs). GPS-kinematics improved significantly for GP1 (-3.1°) and GP3 (-6.6°), but showed no significant change for GP2. GPS-kinematics improved significantly more in GP3 than in GP2. GPS-moments improved equally in all groups (-0.04Nm/kg--0.07Nm/kg). GPS-powers improved significantly more for GP1 and GP2 (0.07W/kg and 0.24W/kg, respectively) than for GP3 where no change occurred.

Significance

The results suggest that different pre-SDR gait patterns have distinct outcomes post-SDR in children with spastic paresis. Therefore gait patterns could guide selection and expectation management for SDR. Future studies should confirm these results in a larger cohort.

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引用次数: 0

High risk of falling in elderly with hallux valgus evaluated by muscle and kinematic synergistic analysis

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-29 DOI: 10.1016/j.gaitpost.2025.01.025

Yanyan Liu , Jun Chen , Ruiping Liu , Chunyan Chen , Xinzhu Wan , Wanqi Yu , Hua Lu , Jun Ouyang , Gang Liu , Lei Qian

Background

Musculoskeletal disorders often present with abnormalities in neuromuscular control. Hallux valgus (HV) is considered a risk factor for falls in the elderly, and it is one of the foot conditions most associated with falls. The onset of falls is associated with neuromuscular modulation of the lower extremity. However, there is a lack of clarity regarding the muscle and kinematic synergy patterns i.e., neuromuscular control in elderly HV.

Research question

How the changes in neuromuscular control in elderly HV based on muscle and kinematic synergies analysis?

Methods

The study included three groups: young controls (YC), elderly controls (EC), and elderly hallux valgus (HVE). All participants were assessed for gait at their natural walking speed. Data were analyzed using non-negative matrix factorization (NNMF) for electromyography (EMG) and joint motion to compare muscle and kinematic synergies across the groups. The center of plantar pressure (COP) was used to evaluate self-balancing ability.

Results

The EC group demonstrated the additional activation of calf muscle groups accompanied by decreased ankle motion and increased hip abduction. Compared to the EC group, the HVE group required more thigh flexor muscle groups to compensate for the lack of function of the ankle movements during gait and showed decreased hip abduction but increased knee flexion. During gait, the COP were significantly large than YC and EC groups (P < 0.05) in the HVE group.

Significance

Our finding indicate that the elderly individuals with hallux valgus exhibit under-activated calf muscles around foot joints, and despite compensations from thigh muscles, they maintain an imbalance and increased risk of falls. This study will help to evaluate HVE control strategies and provide personalized treatment based on these vulnerabilities to reduce the risk of HVE falls.

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引用次数: 0

Effects of spinal stimulation and short-burst treadmill training on gait biomechanics in children with cerebral palsy

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-29 DOI: 10.1016/j.gaitpost.2025.01.016

Charlotte R. DeVol , Siddhi R. Shrivastav , Victoria M. Landrum , Kristie F. Bjornson , Desiree Roge , Chet T. Moritz , Katherine M. Steele

Background

Children with cerebral palsy (CP) have an injury to the central nervous system around the time of birth that affects the development of the brain and spinal cord. This injury leads to changes in gait neuromechanics, including muscle activity and joint kinematics. Transcutaneous spinal cord stimulation (tSCS) is a novel neuromodulation technique that may improve movement and coordination in children with CP when paired with targeted physical therapy.

Research Question

How does the combination of tSCS and short-burst interval locomotor treadmill training (SBLTT) affect individual gait neuromechanics in children with CP?

Methods

Four children with CP (4–13 years old), received 24 sessions each of SBLTT only and SBLTT with tSCS (tSCS+SBLTT). Clinical assessments of spasticity and passive range of motion (PROM), as well as biomechanical assessments of joint kinematics, musculotendon lengths, and muscle activity were recorded during overground, barefoot walking. Assessments were taken before and after each intervention, and 8-weeks later.

Results

The combination of tSCS+SBLTT led to greater increases in hip and knee extension than SBLTT only for three participants. Three children also became more plantarflexed at the ankle during stance after tSCS+SBLTT compared to SBLTT only. While tSCS+SBLTT reduced spasticity, these changes were only weakly correlated with changes in musculotendon lengths during gait or PROM, with the largest correlation between change in gastrocnemius operating musculotendon length during fast walking and gastrocnemius spasticity (R² = 0.26) and change in plantarflexor PROM and gastrocnemius spasticity (R² = 0.23).

Significance

Children with CP used a more upright, less crouched posture during gait after tSCS+SBLTT. Large reductions in spasticity after tSCS+SBLTT were only weakly correlated with changes in kinematics and PROM. Understanding the mechanisms by which tSCS may affect gait for children with CP is critical to optimize and inform the use of tSCS for clinical care.

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引用次数: 0

A study on the balance ability and plantar pressure of sarcopenia patients in different standing postures

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-28 DOI: 10.1016/j.gaitpost.2025.01.031

Qing Xiao , Jie Jiang , Shulang Han , Yan Xiong , Yu Chen , Fei Yan , Jirong Yue

Background

Sarcopenia usually manifests as a decrease in muscle mass and strength, seriously affecting the quality of life and independent living ability of elderly people. Moreover, sarcopenia is associated with various adverse outcomes such as mortality, postoperative infections, and severe complications, as well as affecting the balance and plantar pressure of the elderly.

Research question

What are the characteristics of balance ability and plantar pressure in sarcopenia population across different standing postures?

Methods

A plantar pressure measurement system was used to measure the COP parameters and plantar pressure of 70 individuals in four standing postures: Feet 10 cm apart (FA), Feet together (FT), Feet Semi Tandem (FST), and Feet Full Tandem (FFT). The plantar area was divided into ten regions based on the anatomical structure of the foot. An independent samples t-test was conducted for significance testing, and developed sarcopenia screening models based on binary logistic regression.

Results

Research has found that there are significant differences in the center of plantar pressure (COP) speed, 95 % elliptical region, COP length, and short axis length between populations with and without sarcopenia in the FST stance. The analysis of plantar pressure showed that the main differences between the two groups were located in the metatarsal and heel regions, and the accuracy of the binary logistic regression model constructed based on the FFT stance plantar pressure data without weight-adjusted for screening sarcopenia was as high as 94.3 %, which was superior to other standing postures.

Significance

The difference in balance ability between sarcopenia population and non-sarcopenia population is reflected in standing posture with a relatively narrower base of support on the plantar surface (FST), and FFT stance plantar pressure can be used as a new method for screening sarcopenia.

{"title":"A study on the balance ability and plantar pressure of sarcopenia patients in different standing postures","authors":"Qing Xiao , Jie Jiang , Shulang Han , Yan Xiong , Yu Chen , Fei Yan , Jirong Yue","doi":"10.1016/j.gaitpost.2025.01.031","DOIUrl":"10.1016/j.gaitpost.2025.01.031","url":null,"abstract":"<div><h3>Background</h3><div>Sarcopenia usually manifests as a decrease in muscle mass and strength, seriously affecting the quality of life and independent living ability of elderly people. Moreover, sarcopenia is associated with various adverse outcomes such as mortality, postoperative infections, and severe complications, as well as affecting the balance and plantar pressure of the elderly.</div></div><div><h3>Research question</h3><div>What are the characteristics of balance ability and plantar pressure in sarcopenia population across different standing postures?</div></div><div><h3>Methods</h3><div>A plantar pressure measurement system was used to measure the COP parameters and plantar pressure of 70 individuals in four standing postures: Feet 10 cm apart (FA), Feet together (FT), Feet Semi Tandem (FST), and Feet Full Tandem (FFT). The plantar area was divided into ten regions based on the anatomical structure of the foot. An independent samples t-test was conducted for significance testing, and developed sarcopenia screening models based on binary logistic regression.</div></div><div><h3>Results</h3><div>Research has found that there are significant differences in the center of plantar pressure (COP) speed, 95 % elliptical region, COP length, and short axis length between populations with and without sarcopenia in the FST stance. The analysis of plantar pressure showed that the main differences between the two groups were located in the metatarsal and heel regions, and the accuracy of the binary logistic regression model constructed based on the FFT stance plantar pressure data without weight-adjusted for screening sarcopenia was as high as 94.3 %, which was superior to other standing postures.</div></div><div><h3>Significance</h3><div>The difference in balance ability between sarcopenia population and non-sarcopenia population is reflected in standing posture with a relatively narrower base of support on the plantar surface (FST), and FFT stance plantar pressure can be used as a new method for screening sarcopenia.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"118 ","pages":"Pages 51-60"},"PeriodicalIF":2.2,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of hybrid custom foot orthoses on running economy, running mechanics and comfort: A double-blinded randomized crossover study

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-28 DOI: 10.1016/j.gaitpost.2025.01.030

Ken Van Alsenoy , Marietta L. van der Linden , Olivier Girard , Joong Hyun Ryu , Lubna Al Raisi , Derek Santos

Objective

This study examined the effects of orthotic materials on running economy, running mechanics, and footwear comfort.

Design

A double-blinded randomized crossover study design was used.

Method

Eighteen athletes ran on an instrumented treadmill for six minutes at speeds corresponding to 10 % below their first ventilatory threshold (average: 9.9 ± 1.3 km/h) in four footwear conditions [control (CON), Ethyl vinyl acetate (EVA), Thermoplastic Polyurethane (TPU), and a combination of EVA and TPU (HYB)].

Results

No differences were found in running economy between conditions (p = 0.099). All custom foot orthoses materials reduced peak heel impact force vs CON (p < 0.001). TPU reduced hysteresis at heel impact vs CON (-47.8 %, p = 0.016). Shorter flight time (-3.8 %, p = 0.016; −3.1 %, p = 0.021) and lower mean vertical loading rate (-4.0 %, p = 0.003; −7.1 %, p < 0.001) occurred for HYB vs TPU and CON, respectively. Higher peak vertical loading rates (+7.4 %, p = 0.002) and earlier impact peaks (-5.7 %, p < 0.001) were found for HYB vs TPU. HYB exhibited longer propulsive phase duration (+2.0 %, p = 0.003) but lower peak propulsive force (-3.3 %, p = 0.009) vs CON. Reduced ‘overall comfort’ (-26.4 %, p = 0.004), ‘comfort of heel cushioning’ (-43.3 %, p < 0.001), and ‘comfort of forefoot cushioning’ (-18.3 %, p = 0.048) was found for HYB vs TPU, but ‘comfort of forefoot cushioning’ (+48.0 %, p = 0.032) showed an increase vs EVA.

Conclusions

Combining materials could enhance comfort during running causing subtle changes in running mechanics. Overall, neither EVA, TPU nor their combination significantly improved running economy compared to CON.

{"title":"Effects of hybrid custom foot orthoses on running economy, running mechanics and comfort: A double-blinded randomized crossover study","authors":"Ken Van Alsenoy , Marietta L. van der Linden , Olivier Girard , Joong Hyun Ryu , Lubna Al Raisi , Derek Santos","doi":"10.1016/j.gaitpost.2025.01.030","DOIUrl":"10.1016/j.gaitpost.2025.01.030","url":null,"abstract":"<div><h3>Objective</h3><div>This study examined the effects of orthotic materials on running economy, running mechanics, and footwear comfort.</div></div><div><h3>Design</h3><div>A double-blinded randomized crossover study design was used.</div></div><div><h3>Method</h3><div>Eighteen athletes ran on an instrumented treadmill for six minutes at speeds corresponding to 10 % below their first ventilatory threshold (average: 9.9 ± 1.3 km/h) in four footwear conditions [control (CON), Ethyl vinyl acetate (EVA), Thermoplastic Polyurethane (TPU), and a combination of EVA and TPU (HYB)].</div></div><div><h3>Results</h3><div>No differences were found in running economy between conditions (p = 0.099). All custom foot orthoses materials reduced peak heel impact force <em>vs</em> CON (p < 0.001). TPU reduced hysteresis at heel impact <em>vs</em> CON (-47.8 %, p = 0.016). Shorter flight time (-3.8 %, p = 0.016; −3.1 %, p = 0.021) and lower mean vertical loading rate (-4.0 %, p = 0.003; −7.1 %, p < 0.001) occurred for HYB <em>vs</em> TPU and CON, respectively. Higher peak vertical loading rates (+7.4 %, p = 0.002) and earlier impact peaks (-5.7 %, p < 0.001) were found for HYB <em>vs</em> TPU. HYB exhibited longer propulsive phase duration (+2.0 %, p = 0.003) but lower peak propulsive force (-3.3 %, p = 0.009) <em>vs</em> CON. Reduced ‘overall comfort’ (-26.4 %, p = 0.004), ‘comfort of heel cushioning’ (-43.3 %, p < 0.001), and ‘comfort of forefoot cushioning’ (-18.3 %, p = 0.048) was found for HYB <em>vs</em> TPU, but ‘comfort of forefoot cushioning’ (+48.0 %, p = 0.032) showed an increase <em>vs</em> EVA.</div></div><div><h3>Conclusions</h3><div>Combining materials could enhance comfort during running causing subtle changes in running mechanics. Overall, neither EVA, TPU nor their combination significantly improved running economy compared to CON.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"118 ","pages":"Pages 45-50"},"PeriodicalIF":2.2,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relationship between fear of movement and ankle biomechanical strategies in a 180° change of direction task

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-28 DOI: 10.1016/j.gaitpost.2025.01.029

Samuel P. Brogan , David W. Evans , Louis Howe , Christopher McManus , Qichang Mei , Bernard X.W. Liew

Objective

To assess the association between fear of movement and ankle biomechanics and timed performance in a 505 agility change of direction (COD) test, and to assess the association between the biomechanical indices with timed performance.

Methods

Twenty participants, who play football at a university level or higher, with a history of ankle injuries were recruited. All participants performed three maximal effort 505 agility COD tests. Three-dimensional ankle range of motion (ROM, measured using inertial measurement units) and the average ankle muscle co-activation (tibialis anterior, soleus, and peroneus longus muscles of the affected limb, measured using bipolar surface electromyography) were extracted from the stance phase of the final cutting step. Fear of movement was assessed using the Tampa Scale of Kinesiophobia 11-item (TSK-11) questionnaire.

Results

TSK-11 significantly correlated with ankle transverse plane ROM: r = -0.53 (95 %CI −0.79 to −0.11), t = -2.63, P = 0.017. There was no significant association between the COD timed performance and the four ankle biomechanical indices.

Conclusions

Greater fear of movement may result in a stiffer turning strategy, which may reduce the risk of injury to the ankle. However, fear of movement is less likely to moderate ankle kinematic and muscle activation strategies that give rise to a performance-injury conflict.

{"title":"The relationship between fear of movement and ankle biomechanical strategies in a 180° change of direction task","authors":"Samuel P. Brogan , David W. Evans , Louis Howe , Christopher McManus , Qichang Mei , Bernard X.W. Liew","doi":"10.1016/j.gaitpost.2025.01.029","DOIUrl":"10.1016/j.gaitpost.2025.01.029","url":null,"abstract":"<div><h3>Objective</h3><div>To assess the association between fear of movement and ankle biomechanics and timed performance in a 505 agility change of direction (COD) test, and to assess the association between the biomechanical indices with timed performance.</div></div><div><h3>Methods</h3><div>Twenty participants, who play football at a university level or higher, with a history of ankle injuries were recruited. All participants performed three maximal effort 505 agility COD tests. Three-dimensional ankle range of motion (ROM, measured using inertial measurement units) and the average ankle muscle co-activation (tibialis anterior, soleus, and peroneus longus muscles of the affected limb, measured using bipolar surface electromyography) were extracted from the stance phase of the final cutting step. Fear of movement was assessed using the Tampa Scale of Kinesiophobia 11-item (TSK-11) questionnaire.</div></div><div><h3>Results</h3><div>TSK-11 significantly correlated with ankle transverse plane ROM: r = -0.53 (95 %CI −0.79 to −0.11), t = -2.63, P = 0.017. There was no significant association between the COD timed performance and the four ankle biomechanical indices.</div></div><div><h3>Conclusions</h3><div>Greater fear of movement may result in a stiffer turning strategy, which may reduce the risk of injury to the ankle. However, fear of movement is less likely to moderate ankle kinematic and muscle activation strategies that give rise to a performance-injury conflict.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"118 ","pages":"Pages 39-44"},"PeriodicalIF":2.2,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A machine learning approach to real-time calculation of joint angles during walking and running using self-placed inertial measurement units

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-26 DOI: 10.1016/j.gaitpost.2025.01.028

David C. Ackland, Zhou Fang, Damith Senanayake

Background

Inter-segment joint angles can be obtained from inertial measurement units (IMUs); however, accurate 3D joint motion measurement, which requires sensor fusion and signal processing, sensor alignment with segments and joint axis calibration, can be challenging to achieve.

Research question

Can an artificial neural network modeling framework be used for direct, real-time conversion of IMU data to joint angles during walking and running, and how does sensor number, location on the body and gait speed impact prediction accuracy?

Methods

Thirty healthy adult participants performed gait experiments in which kinematics data were obtained from self-placed IMUs and video motion analysis, the reference standard for joint kinematics. Data were collected during walking at 0.5 m/s, 1.0 m/s and 1.5 m/s, as well as during running at 2.0 m/s and 3.0 m/s. A generative adversarial network was trained and used to predict lower limb joint angles at all gait speeds using IMU data only, and prediction accuracy assessed using all combinations of sensors.

Results

Joint angle prediction accuracy was strongly dependent on the number and location of sensors, as well as walking and running speed. A single IMU could be used to predict sagittal plane joint angles at either the hip, knee or ankle during walking with RMS errors below 4.0°, though highest 3D joint motion accuracy was obtained with two or three IMUs for a given joint.

Significance

This study reports a modeling framework for direct conversion of IMU data to joint angles without signal processing or joint calibration. The findings suggest that combinations of up to four IMUs reproduce hip, knee and ankle joint kinematics simultaneously during walking and running with highest accuracy. The findings may be useful in maximizing accuracy of IMU-based motion measurements of the lower limb joints in applications such as remote monitoring of movement, sports training, and in rehabilitation.

{"title":"A machine learning approach to real-time calculation of joint angles during walking and running using self-placed inertial measurement units","authors":"David C. Ackland, Zhou Fang, Damith Senanayake","doi":"10.1016/j.gaitpost.2025.01.028","DOIUrl":"10.1016/j.gaitpost.2025.01.028","url":null,"abstract":"<div><h3>Background</h3><div>Inter-segment joint angles can be obtained from inertial measurement units (IMUs); however, accurate 3D joint motion measurement, which requires sensor fusion and signal processing, sensor alignment with segments and joint axis calibration, can be challenging to achieve.</div></div><div><h3>Research question</h3><div>Can an artificial neural network modeling framework be used for direct, real-time conversion of IMU data to joint angles during walking and running, and how does sensor number, location on the body and gait speed impact prediction accuracy?</div></div><div><h3>Methods</h3><div>Thirty healthy adult participants performed gait experiments in which kinematics data were obtained from self-placed IMUs and video motion analysis, the reference standard for joint kinematics. Data were collected during walking at 0.5 m/s, 1.0 m/s and 1.5 m/s, as well as during running at 2.0 m/s and 3.0 m/s. A generative adversarial network was trained and used to predict lower limb joint angles at all gait speeds using IMU data only, and prediction accuracy assessed using all combinations of sensors.</div></div><div><h3>Results</h3><div>Joint angle prediction accuracy was strongly dependent on the number and location of sensors, as well as walking and running speed. A single IMU could be used to predict sagittal plane joint angles at either the hip, knee or ankle during walking with RMS errors below 4.0°, though highest 3D joint motion accuracy was obtained with two or three IMUs for a given joint.</div></div><div><h3>Significance</h3><div>This study reports a modeling framework for direct conversion of IMU data to joint angles without signal processing or joint calibration. The findings suggest that combinations of up to four IMUs reproduce hip, knee and ankle joint kinematics simultaneously during walking and running with highest accuracy. The findings may be useful in maximizing accuracy of IMU-based motion measurements of the lower limb joints in applications such as remote monitoring of movement, sports training, and in rehabilitation.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"118 ","pages":"Pages 85-91"},"PeriodicalIF":2.2,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pendulum model to compare center of pressure data between different force plates

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-01-25 DOI: 10.1016/j.gaitpost.2025.01.026

Sam Limpach , Peter Leinen , Thomas Muehlbauer , Katharina Borgmann , Stefan Panzer

Background

Force plates are used to measure postural control. However, force plates differ with regard to the type of sensors and the position of the sensors. The purpose of the study was to introduce a method for testing the comparability of two force plates with different force transducers regarding their center of pressure (CoP) capturing.

Methods

Two portable force plates (Kistler Model 9260AA vs. AMTI AccuSway-Optimized ACS-O) were compared. To produce repeatable, close to identical CoP data, a two-point suspension pendulum was used. The deflection angle of the pendulum was kept constant as well as the time of capturing the swing (30 s) and the frequency of capturing the data (1000 Hz). To test for comparability, the captured data was z-transformed and superimposed. Furthermore, interclass correlation coefficient (ICC) estimates, and their 95 % confidence intervals (CI) were calculated.

Results and significance

The ICC for the two tested force plates were "excellent" (x-axis: ICC = 0.990 (95 % CI [0.990–0.990]), y-axis: ICC = 0.987 (95 % CI [0.987–0.988])). Thus, the presented method with the two-point suspension pendulum generated repeatable and almost identical oscillations in the x- and y-axis to calculate the CoP.

Data availability

Data will be made available on request.

{"title":"Pendulum model to compare center of pressure data between different force plates","authors":"Sam Limpach , Peter Leinen , Thomas Muehlbauer , Katharina Borgmann , Stefan Panzer","doi":"10.1016/j.gaitpost.2025.01.026","DOIUrl":"10.1016/j.gaitpost.2025.01.026","url":null,"abstract":"<div><h3>Background</h3><div>Force plates are used to measure postural control. However, force plates differ with regard to the type of sensors and the position of the sensors. The purpose of the study was to introduce a method for testing the comparability of two force plates with different force transducers regarding their center of pressure (CoP) capturing.</div></div><div><h3>Methods</h3><div>Two portable force plates (Kistler Model 9260AA vs. AMTI AccuSway-Optimized ACS-O) were compared. To produce repeatable, close to identical CoP data, a two-point suspension pendulum was used. The deflection angle of the pendulum was kept constant as well as the time of capturing the swing (30 s) and the frequency of capturing the data (1000 Hz). To test for comparability, the captured data was z-transformed and superimposed. Furthermore, interclass correlation coefficient (ICC) estimates, and their 95 % confidence intervals (CI) were calculated.</div></div><div><h3>Results and significance</h3><div>The ICC for the two tested force plates were \"excellent\" (x-axis: ICC = 0.990 (95 % CI [0.990–0.990]), y-axis: ICC = 0.987 (95 % CI [0.987–0.988])). Thus, the presented method with the two-point suspension pendulum generated repeatable and almost identical oscillations in the x- and y-axis to calculate the CoP.</div></div><div><h3>Data availability</h3><div>Data will be made available on request.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"118 ","pages":"Pages 13-16"},"PeriodicalIF":2.2,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143070390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0