Journal of Electromyography and Kinesiology最新文献_第7页

Diagnostic value of EMG of sternocleidomastoid and trapezius in assessing bulbar lower motor neuron involvement in amyotrophic lateral sclerosis patients 胸锁乳突肌和斜方肌肌电图对肌萎缩侧索硬化症患者球下运动神经元受累的诊断价值

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-10-01 Epub Date: 2025-07-23 DOI: 10.1016/j.jelekin.2025.103040

Jiarui Zhao , Jiongming Bai , Hongfen Wang , Ying Zhang , Jinghong Zhang , Yahui Zhu , Xinyuan Pang , Zhaohui Chen , Li Ling , Hongmei Cheng , Mao Li , Xusheng Huang

The diagnostic value of needle electromyography (EMG) of sternocleidomastoid (SCM) and trapezius (TRA) in assessing bulbar lower motor neuron involvement (LMN) remained controversial. 203 sporadic amyotrophic lateral sclerosis (ALS) patients were enrolled to assess the correlation between EMG abnormalities in SCM and TRA and bulbar LMN involvement. Additionally, difference analysis and diagnostic consistency analysis of EMG abnormalities in GEN (genioglossus), SCM, and TRA were compared. Finally, separate effects of EMG abnormalities in GEN, SCM, and TRA on diagnostic gradings were examined according to the Awaji-Shima criteria. 22 (18.2 %) and 65 (53.7 %) patients without bulbar LMN involvement showed EMG abnormalities in SCM and TRA. In contrast, 19 (23.2 %) and 11 (13.4 %) patients with bulbar LMN involvement showed normal EMG results in SCM and TRA. Multivariate logistic regression analyses showed that both EMG abnormalities in SCM and TRA were correlated with bulbar LMN involvement (P < 0.001). SCM showed electrophysiological characteristics similar to GEN when compared to TRA. However, TRA (67.0 %) showed significantly higher rates of EMG abnormalities than SCM (41.9 %) and GEN (40.4 %) in the whole study population. Reclassified diagnostic gradings showed no significant difference when evaluating EMG abnormalities in individual muscles to indicate bulbar LMN involvement (P = 0.072). EMG abnormalities in SCM and TRA could not fully represent bulbar LMN involvement but were correlated with it. It’s advisable to prioritise TRA as a better option when a patient cannot tolerate an EMG examination in the GEN. To enhance the diagnostic evaluation, an EMG examination of GEN could be served as the last choice.

胸锁乳突肌（SCM）和斜方肌（TRA）的针肌电图（EMG）在评估球下运动神经元受累（LMN）中的诊断价值一直存在争议。203例散发性肌萎缩性侧索硬化症（ALS）患者被纳入研究，以评估SCM和TRA肌电图异常与脊髓LMN受累的相关性。此外，比较GEN （genigenogssus）、SCM和TRA的肌电异常的差异分析和诊断一致性分析。最后，根据Awaji-Shima标准，分别检查GEN、SCM和TRA的肌电异常对诊断分级的影响。22例（18.2%）和65例（53.7%）未受累的患者在SCM和TRA表现出肌电异常。相比之下，19例（23.2%）和11例（13.4%）受累于球LMN的患者在SCM和TRA上的肌电图显示正常。多因素logistic回归分析显示，SCM和TRA的肌电图异常与球部LMN受累相关(P <；0.001)。与TRA相比，SCM表现出与GEN相似的电生理特征。然而，在整个研究人群中，TRA（67.0%）的肌电异常率明显高于SCM（41.9%）和GEN（40.4%）。重新分类的诊断分级在评估单个肌肉的肌电图异常以指示球LMN受累时没有显着差异（P = 0.072）。SCM和TRA的肌电异常不能完全代表LMN受累，但与之相关。当患者不能忍受GEN肌电图检查时，建议优先考虑TRA作为更好的选择。为了提高诊断评价，GEN肌电图检查可以作为最后的选择。

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引用次数: 0

Vigorous physical activity enhances intermuscular coordination between ankle muscles during gait. 剧烈的体力活动增强了步态中踝关节肌肉间的肌肉协调。

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-10-01 Epub Date: 2025-08-05 DOI: 10.1016/j.jelekin.2025.103045

Carlos Cruz-Montecinos, Camila Barraza-Viluñir, Luis Acuña-Cancino, Jean Arias, Cristina Olivares, Rodrigo Nuñez-Cortés, Joaquín Calatayud, Xavier Garcia-Masso, Carlos De la Fuente, Claudio Tapia, Felipe P Carpes

Intermuscular coordination (IMC) refers to the nervous system's ability to synchronise muscle activity. While regular physical activity is thought to enhance IMC, the nature of this relationship remains poorly understood. Here we investigate whether high and low IMC between ankle muscles during gait differs based on physical activity levels and individuals' weekly engagement in vigorous activities among young adults. Twenty-five participants (10 females) aged 20-34 years were evaluated. Surface electromyography (EMG) recorded activity of the tibialis anterior (TA), soleus (SOL), and medial gastrocnemius (GM) at 1000 Hz during 10 walking trials at 1 m/s (90 m total). Each EMG epoch included 200 ms before to 600 ms after heel contact and was analysed using causal empirical mode decomposition to identify intrinsic mode functions (IMFs) with stronger causal relationships among muscle pairs. Coordination between selected IMFs of the SOL-TA and SOL-MG muscle pairs was assessed using cross-approximate entropy (XApEn). K-means clustering of XApEn values identified low and high IMC groups (p < 0.001). Proportion of physically active individuals was 83 % in high IMC group, compared to 23 % in low IMC group (p = 0.003). Weekly vigorous activity was greater in the active group (240 vs. 0 min, p = 0.010) and showed a significant moderate correlation with IMC between antagonistic muscles. Physical activity enhances intermuscular coordination among ankle muscles during gait. This emphasizes the role of physical activity, particularly vigorous activity, in enhancing neuromuscular function and counteracting the negative effects of sedentary behaviour on the neuromuscular system.

肌间协调（IMC）是指神经系统同步肌肉活动的能力。虽然人们认为有规律的体育活动可以增强IMC，但人们对这种关系的本质仍知之甚少。在这里，我们研究了步态中踝关节肌肉之间的高IMC和低IMC是否会根据身体活动水平和年轻人每周的剧烈活动而有所不同。25名参与者（10名女性），年龄20-34岁。表面肌电图（EMG）记录了10次以1米/秒（共90米）的速度行走试验中胫骨前肌（TA）、比目鱼肌（SOL）和腓肠肌内侧肌（GM）在1000赫兹下的活动。每个EMG epoch包括与足跟接触前200 ms至接触后600 ms，并使用因果经验模式分解进行分析，以识别肌肉对之间具有较强因果关系的内在模式函数（IMFs）。采用交叉近似熵（cross-approximate entropy, XApEn）评估SOL-TA和SOL-MG肌肉对所选imf之间的协调性。XApEn值的K-means聚类确定了低和高IMC组(p

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引用次数: 0

An articulated ankle foot orthosis with plantarflexion resistance decreased soleus and tibialis anterior muscle activity, and plantarflexion moment of the paretic lower limb of persons with stroke 关节踝关节足矫形器，抗跖屈，降低比目鱼肌和胫骨前肌活动，减少中风患者下肢的跖屈力矩

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-10-01 Epub Date: 2025-07-14 DOI: 10.1016/j.jelekin.2025.103041

Oluwaseye P. Odanye , Emily A. Steffensen , Aaron D. Likens , Elisa S. Arch , Brian A. Knarr

Ankle foot orthoses (AFOs) are important devices for assisting persons with stroke during walking, especially in mediating dorsiflexor weakness. The plantarflexion (PF) resistances of AFOs have been shown to augment dorsiflexor muscle function during the stance and swing phases of gait. However, it is not clear how this translates to the muscle activities of their paretic lower limbs. To further explore this question in stroke rehabilitation, 3D technology was used in designing and fabricating an individual-specific articulated AFO, which we assembled with a mechanical joint that enabled the application of PF resistances. We investigated the impact of regulating two PF resistances (PF1, PF2) on their paretic lower limb muscle activity. At PF2, there was significantly lower mean muscle activity for the Soleus in LR and the Tibialis anterior in the second rocker, pre-swing, and swing phases. The device only impacted the activity of the medial gastrocnemius muscle at the second rocker. The findings corroborated evidence regarding how AFOs with PF resistance impact the muscle activity of stroke survivors following a single session use; however, longitudinal studies are necessary to establish the impacts with long-term use, as most stroke survivors use AFOs long-term.

踝关节足矫形器（AFOs）是辅助中风患者行走的重要装置，特别是在调节背屈肌无力方面。afo的跖屈（PF）阻力已被证明可以增强站立和摇摆步态阶段的背屈肌功能。然而，目前尚不清楚这如何转化为他们的下肢肌肉活动。为了在中风康复中进一步探索这一问题，我们使用3D技术设计和制造了一个个人特定的铰接式AFO，我们将其与一个能够应用PF阻力的机械关节组装在一起。我们研究了调节两种PF阻力（PF1, PF2）对其麻痹性下肢肌肉活动的影响。在PF2时，LR阶段的比目鱼肌和第二摇臂阶段、摇摆前阶段和摇摆阶段的胫骨前肌的平均肌肉活动显著降低。该装置仅影响第二摇杆处内侧腓肠肌的活动。研究结果证实了在单次使用后，具有PF阻力的afo如何影响中风幸存者的肌肉活动；然而，纵向研究是必要的，以确定长期使用的影响，因为大多数中风幸存者长期使用afo。

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引用次数: 0

Does hemiparetic dorsiflexion in swing phase depend on spasticity? 摇摆期偏瘫背屈是否与痉挛有关？

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-10-01 Epub Date: 2025-08-10 DOI: 10.1016/j.jelekin.2025.103047

Maria Vinti , Mathias Blandeau , Hélène Pillet , Wafa Skalli , Philippe Decq , Andrea Merlo , Jean-Michel Gracies , Nicolas Bayle , Mouna Ghédira , Emilie Hutin

Objective

This study quantified dorsiflexor and plantar flexor (PF) spasticity, and agonist and antagonist recruitment (cocontractions) during the swing phase of gait in individuals with hemiparesis with and without prior tibial neurotomy, investigating the role of spastic cocontraction versus spasticity in limiting dorsiflexion (DF).

Methods

Eleven hemiparetic subjects and 11 controls walking at comfortable and slow velocities underwent kinematic and electromyographic (EMG) analysis of PF and DF muscles. Five of the hemiparetic subjects had undergone tibial nerve neurotomy, which eliminates PF spasticity. Key metrics included ankle dorsiflexion, tibialis anterior recruitment, and coefficients of antagonist activation of gastrocnemius medialis and soleus during swing. Spasticity was assessed using the Tardieu scale.

Results

Controls walking at slow speed showed similar velocity as hemiparetic subjects. Hemiparetic subjects showed reduced ankle dorsiflexion despite higher tibialis anterior recruitment, increased plantar flexor cocontraction before any dorsiflexion, even in neurotomy patients without spasticity.

Conclusions

Increased PF cocontraction persists even in the absence of spasticity, limiting dorsiflexion during swing. Spastic cocontraction, not spasticity, is a primary factor impairing active DF.

Significance

These findings emphasize that targeting spastic cocontraction of plantar flexors may be crucial for improving dorsiflexion and gait rehabilitation in hemiparetic patients, instead of addressing spasticity.

目的：本研究量化偏瘫患者在步态摇摆期背屈肌和足底屈肌（PF）的痉挛，以及激动剂和拮抗剂的招募（收缩），研究痉挛性收缩与痉挛性收缩在限制背屈（DF）中的作用。方法对6例偏瘫患者和11例正常人进行慢速舒适步行的运动和肌电图（EMG）分析。5名偏瘫患者接受了胫骨神经切开术，消除了PF痉挛。关键指标包括踝关节背屈，胫骨前肌恢复，以及在摆动过程中腓肠肌内侧肌和比目鱼肌的拮抗剂激活系数。采用Tardieu量表评估痉挛程度。结果对照组慢速行走速度与偏瘫组相近。偏瘫患者表现出踝关节背屈减少，尽管胫骨前肌收缩增加，在任何背屈之前足底屈肌收缩增加，即使在没有痉挛的神经切开术患者中也是如此。结论：即使在没有痉挛的情况下，PF收缩的增加仍然存在，限制了摆动时的背屈。痉挛性收缩，而不是痉挛，是损害活性DF的主要因素。这些发现强调，针对足底屈肌的痉挛性收缩可能对改善偏瘫患者的背屈和步态康复至关重要，而不是解决痉挛问题。

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引用次数: 0

Electromyographic assessment of agonist and antagonist muscles related to the anterior cruciate ligament following surgical Reconstruction: A Cross-Sectional study 手术重建后与前交叉韧带相关的激动剂和拮抗剂肌肉的肌电图评估：一项横断面研究

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-10-01 Epub Date: 2025-08-05 DOI: 10.1016/j.jelekin.2025.103044

Ricardo Paredes , Carlos Crasto , António Mesquita Montes , Anabela André , Soraia Pereira , Diana Guedes , Leonel Alves , José L. Arias-Buría

Background

Following anterior cruciate ligament reconstruction (ACLR), neuromuscular control alterations may persist, increasing the risk of reinjury. Objectives: This study aimed to investigate electromyographic (EMG) muscle activation and the co-contraction index (CCI) of ACL-related agonist and antagonist muscles during side-hop tasks in ACLR individuals, offering novel insights into neuromuscular strategies during dynamic tasks. Methods: A cross-sectional study was conducted with 15 ACLR individuals and 15 participants without ACL injury (N-ACLR). Participants performed side-hop tasks while kinematic, kinetic, and EMG data were recorded during the preparatory and loading phases. Statistical analyses were performed at a 95 % confidence level. Results: During ipsilateral side hops, ACLR individuals exhibited higher semitendinosus (ST) activity in the initial contact (IC) and risk phases and increased quadriceps:hamstrings (Q:H) CCI in the risk phase compared to N-ACLR (p < 0.05). In contralateral side hops, ACLR individuals demonstrated higher Q:H CCI in the preparatory phase and higher vastus lateralis:biceps femoris (VL:BF) CCI in the IC and risk phases (p < 0.05). Conclusion: ACLR individuals display altered neuromuscular strategies during side-hop tasks compared to N-ACLR, highlighting adaptations in muscle activation and co-contraction patterns.

背景：前交叉韧带重建（ACLR）后，神经肌肉控制改变可能持续存在，增加再损伤的风险。目的：本研究旨在研究ACLR个体侧跳任务中acl相关激动剂和拮抗剂肌肉的肌电图（EMG）肌肉激活和共收缩指数（CCI），为动态任务中的神经肌肉策略提供新的见解。方法：对15例ACLR患者和15例无ACL损伤（N-ACLR）的参与者进行横断面研究。在准备和加载阶段，参与者进行侧跳任务，同时记录运动学、动力学和肌电图数据。统计分析在95%的置信水平上进行。结果：与N-ACLR相比，在同侧跳跃期间，ACLR个体在初次接触（IC）和危险阶段表现出更高的半腱肌（ST）活性，并且在危险阶段表现出更高的股四头肌：腘绳肌（Q:H） CCI (p <；0.05)。在对侧跳跃中，ACLR个体在准备阶段表现出较高的Q:H CCI，在IC和危险阶段表现出较高的股外侧：股二头肌（VL:BF） CCI (p <；0.05)。结论：与N-ACLR相比，ACLR个体在侧跳任务中表现出改变的神经肌肉策略，突出了肌肉激活和共同收缩模式的适应。

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引用次数: 0

The validity of surface electrodes to record latissimus dorsi activity during submaximal trunk movement and stability tasks 表面电极记录次极大躯干运动和稳定性任务时背阔肌活动的有效性

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-05-10 DOI: 10.1016/j.jelekin.2025.103013

Declan Price , Karen A. Ginn , Mark Halaki , Victor Kwasi , Darren Reed

Introduction

The latissimus dorsi, a large superficial muscle connecting the pelvis, trunk and humerus, has the potential to contribute to trunk movement and stability. Surface electrodes are most typically used to record latissimus dorsi muscle activity during trunk tasks. However, there is the risk of crosstalk from nearby muscles, potentially leading to inaccurate muscle activity estimations. Therefore, this study aimed to determine the validity of using surface electrodes to record latissimus dorsi activity levels during submaximal trunk tasks by comparing the readings to indwelling electrodes simultaneously recorded at the same location.

Methods

Thirteen asymptomatic participants had indwelling electrodes inserted below the inferior angle of the scapula and surface electrodes placed over the same location. The participants completed submaximal trunk movements and stability tasks in various positions.

Results

There were no significant differences in latissimus dorsi activity recorded between surface and indwelling electrodes in all submaximal trunk movement tasks. However, during the trunk stability tasks the surface electrodes recorded significantly higher activity than the indwelling electrodes.

Conclusion

Surface electrodes are recommended as a valid option to record latissimus dorsi activity during submaximal trunk movement tasks. For tasks that challenge trunk stability, indwelling electrodes are recommended to avoid crosstalk from underlying muscles.

背阔肌是连接骨盆、躯干和肱骨的一块大的浅表肌肉，对躯干的运动和稳定性有潜在的帮助。表面电极最典型地用于记录躯干任务时背阔肌的活动。然而，有来自附近肌肉的串扰的风险，可能导致不准确的肌肉活动估计。因此，本研究旨在通过比较在同一位置同时记录的留置电极的读数，来确定在次极大躯干任务中使用表面电极记录背阔肌活动水平的有效性。方法13例无症状患者在肩胛骨下角下方置入留置电极，在同一位置置入表面电极。参与者完成了不同体位的躯干次极限运动和稳定性任务。结果在所有次大躯干运动任务中，表面电极和留置电极记录的背阔肌活动无显著差异。然而，在主干稳定任务中，表面电极记录的活性明显高于留置电极。结论体表电极是记录躯干次大运动任务时背阔肌活动的有效方法。对于挑战躯干稳定性的任务，建议留置电极以避免来自底层肌肉的串扰。

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引用次数: 0

Performance fatigability on a constant-load dynamic task is greater in females with moderate-severity Parkinson’s disease than healthy-aging controls 在恒定负荷动态任务中，表现疲劳在中度帕金森病的女性比健康衰老的对照组更大

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-05-26 DOI: 10.1016/j.jelekin.2025.103023

Avery Hinks , Pardeep Khangura , Elira Leake , Taylor Beedie , Muhammad M. Kathia , Sergiu-Gabriel Duplea , Leslie A. Witton , Barbara S. Connolly , Jamie F. Burr , Philip J. Millar , Geoffrey A. Power

Parkinson’s disease (PD) is a neurodegenerative disorder associated with self-reported fatigue. While fatigue is a disabling symptom, performance fatigability, a decline in strength or power during sustained tasks, remains poorly understood, particularly during isotonic (constant-load) contractions, which are encountered in everyday activities. We assessed performance fatigability and recovery in people with PD compared to healthy-aging controls. Fifteen females with PD and 14 healthy-aging controls underwent neuromuscular testing of knee extensors using dynamometry. Participants then performed repeated maximal-effort isotonic knee extensions at a 20 % maximum voluntary contraction (MVC) load until peak power declined 40 %. Performance fatigability was assessed by repetitions to task failure, with recovery tracked for 10 min afterwards. Despite no baseline differences in neuromuscular performance, PD achieved ∼58 % fewer repetitions to failure. Immediately post-task failure, compared to controls, PD exhibited less fatigue-induced impairments in MVC torque, voluntary activation, and quadriceps electromyographic (EMG) activity, but similar impairment of twitch torque. For power and twitch torque, PD and controls recovered similarly, whereas PD recovered sooner for MVC torque and quadriceps EMG. Isotonic performance fatigability differs subtly between PD and healthy controls, providing novel insights into the physical manifestations of fatigue in PD and potential implications for understanding disease progression and management.

帕金森病（PD）是一种与自我报告疲劳相关的神经退行性疾病。虽然疲劳是一种致残症状，但人们对运动疲劳，即在持续任务中力量或力量的下降，特别是在日常活动中遇到的等压（恒定负荷）收缩期间，仍然知之甚少。我们评估了PD患者的表现、疲劳和恢复情况，并将其与健康衰老对照组进行了比较。15名女性PD患者和14名健康的老年对照者采用测力法对膝关节伸肌进行神经肌肉测试。然后，参与者在20%的最大自愿收缩负荷（MVC）下重复进行最大努力等张力膝关节伸展，直到峰值功率下降40%。通过重复到任务失败来评估性能疲劳，并在10分钟后追踪恢复情况。尽管神经肌肉表现没有基线差异，但PD的失败重复次数减少了58%。任务失败后，与对照组相比，PD在MVC扭矩、自主激活和股四头肌肌电（EMG）活动方面表现出较少的疲劳引起的损伤，但在抽搐扭矩方面表现出类似的损伤。对于动力和抽搐扭矩，PD和控制恢复相似，而对于MVC扭矩和股四头肌肌电，PD恢复得更快。PD和健康对照之间的等渗性能疲劳有微妙的差异，为PD患者疲劳的生理表现提供了新的见解，并为理解疾病进展和管理提供了潜在的意义。

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引用次数: 0

Hamstring muscle shortens actively during the late swing phase of high-speed running 在高速跑的后期摇摆阶段，腘绳肌主动缩短

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-05-30 DOI: 10.1016/j.jelekin.2025.103022

Jun Hee Yoon , Iseul Jo , Yoon Hyung Cho , Kyeongtak Song , Hae-Dong Lee

The purpose of this study was to investigate the muscle–tendon unit (MTU) and fascicle behavior of the biceps femoris long head (BFlh) along with the activation during the swing phase of high-speed running. Nine active males ran on a treadmill at 70, 80, and 90 % of their maximum running speed. Kinematics of the hip and knee joints were collected during running. The fascicle length of the BFlh was monitored using a B-mode real-time ultrasound imaging system. Muscle activation of the BFlh was simultaneously recorded using surface electromyography. During the swing phase of running, the changes in the MTU length for 80 % and 90 % of the maximum running speed was greater than 70 % (p < 0.05). The fascicle was actively lengthened with weak activation during the early to the middle swing phase but actively shortened with strong activation during the late swing phase. Despite the different changes in the MTU length with increasing running speeds (p < 0.05), the fascicle length change was not different. During the late swing phase of high-speed running, the BFlh fascicle was actively shortened, suggesting further investigation explaining the cause of high-speed running-related muscle strain injury while considering the functional characteristics of the muscle–tendon interaction.

本研究的目的是研究高速跑步摇摆阶段股骨二头肌（BFlh）的肌肉-肌腱单元（MTU）和肌束行为。9只活跃的雄性在跑步机上以最大跑步速度的70%、80%和90%跑步。在跑步过程中收集髋关节和膝关节的运动学数据。采用b型实时超声成像系统监测BFlh束束长度。同时用表面肌电图记录BFlh的肌肉激活情况。在运行的摇摆阶段，最大运行速度的80%和90%时MTU长度的变化大于70% (p <；0.05)。在摇摆前期至中期，神经束呈弱激活的主动延长，而在摇摆后期，神经束呈强激活的主动缩短。尽管MTU长度随着运行速度的增加而变化(p <；0.05)，但束长变化无显著性差异。在高速跑的摇摆后期，BFlh束主动缩短，提示在考虑肌肉-肌腱相互作用的功能特征的同时，进一步研究解释高速跑相关肌肉劳损损伤的原因。

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引用次数: 0

A standard operating procedure for the evaluation of vertical jumps performance through surface electromyography assessment: A scoping review 通过表面肌电图评估评估垂直跳跃性能的标准操作程序：范围审查

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-06-20 DOI: 10.1016/j.jelekin.2025.103028

Luca Petrigna , Alessandra Amato , Giorgia Longo , Alessandro Castorina , Simona Pajaujiene , Giuseppe Musumeci

Introduction

The Countermovement Jump (CMJ) and the Squat Jump (SJ) are widely adopted tests to assess muscle strength and power. Neuromuscular data of the jump performance could be provided by surface Electromyography (EMG). While from a biomechanical and technical point of view, there are articles that support the two vertical jumps, less is published regarding surface EMG and the jumps. The objective of the present study was to review the literature to better understand the protocols adopted for a surface EMG evaluation during the CMJ and the SJ and eventually to propose a Standard Operating Procedure (SOP). A SOP could be a useful tool to better understand, compare, and interpret the findings.

Methods

A scoping review was performed. Data were collected on PubMed, Web of Science, and Scopus till 20^th December 2024. The articles were screened against the eligibility criteria and narratively discussed.

Results

A total of 54 articles met the eligibility criteria. The articles present important differences in the methodology and the procedures followed. Differences were also detected in the hardware and the data analysis. From the common information of the articles, a SOP was proposed.

Conclusions

Different methodologies were adopted to evaluate neuromuscular function during the CMJ and the SJ tests. This makes difficult to compare the data. A SOP was proposed with information and guidelines related to muscles, hardware, and data processing. In this way, future studies could follow similar protocols increasing the possibility to compare the findings.

反向起跳（CMJ）和深蹲起跳（SJ）是被广泛采用的评估肌肉力量和力量的测试。表面肌电图（EMG）可以提供跳跃性能的神经肌肉数据。虽然从生物力学和技术的角度来看，有文章支持两种垂直跳跃，但关于表面肌电图和跳跃的文章较少。本研究的目的是回顾文献，以更好地了解在CMJ和SJ期间采用的表面肌电评估方案，并最终提出标准操作程序（SOP）。SOP可以成为更好地理解、比较和解释调查结果的有用工具。方法进行范围综述。数据收集于PubMed、Web of Science和Scopus，截止到2024年12月20日。根据资格标准对文章进行筛选并进行叙述讨论。结果54篇文章符合入选标准。这两篇文章在方法和所遵循的程序方面存在重要差异。在硬件和数据分析方面也发现了差异。根据文章的共同信息，提出了SOP。结论在CMJ和SJ试验中采用不同的方法评价神经肌肉功能。这使得比较数据变得困难。我们提出了一个SOP，其中包含与肌肉、硬件和数据处理相关的信息和指南。通过这种方式，未来的研究可以遵循类似的协议，增加比较研究结果的可能性。

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引用次数: 0

The relationship between voluntary and electrically evoked muscle contractile properties in young women 年轻女性随意肌和电诱发肌收缩特性之间的关系

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-06-10 DOI: 10.1016/j.jelekin.2025.103024

Madison J. Fry, William S. Zoughaib, Richard L. Hoffman, Andrew R. Coggan

Isokinetic dynamometry and neuromuscular electrical stimulation [NMES] are commonly used to assess muscle contractile function, but few studies have investigated the relationship between the two, particularly in women. Thirty young women (age 23 ± 5 y) therefore performed maximal knee extensions on an isokinetic dynamometer at angular velocities of 0.00–6.28 rad/s, after which NMES of the quadriceps was used to determine unpotentiated and potentiated twitch contractile properties as well as the torque-frequency relationship. Voluntary isometric peak torque was correlated with peak torque, absolute rate of torque development, and the absolute rate of relaxation during potentiated twitches (ie, r = 0.557, 0.585, and −0.650, P = 0.00786, 0.00411, and 0.000779, respectively). Voluntary isokinetic peak torques at 1.57 and 3.14 rad/s were also correlated with the potentiated absolute rate of torque development (ie, r = 0.597, P = 0.00309 and r = 0.551, P = 0.00849, respectively). No other significant correlations were found between voluntary and electrically evoked muscle contractile properties, including various measures of the torque-frequency relationship. Although there is some relationship between voluntary and NMES indices of muscle contractility, such results are only moderately well-correlated at best. The two techniques should therefore be considered complementary rather than interchangeable.

等速动力学测量和神经肌肉电刺激[NMES]通常用于评估肌肉收缩功能，但很少有研究调查两者之间的关系，特别是在女性中。因此，30名年轻女性（年龄23±5岁）在角速度为0.00-6.28 rad/s的等速测力仪上进行了最大膝关节伸展，之后使用股四头肌的NMES来确定未增强和增强的抽搐收缩特性以及扭矩-频率关系。自主等长峰值扭矩与峰值扭矩、绝对扭矩发展速率和增强抽搐期间绝对弛豫速率相关（r = 0.557、0.585和- 0.650，P分别= 0.00786、0.00411和0.000779）。自主等速峰值扭矩在1.57和3.14 rad/s时也与增强的绝对扭矩发展速率相关（分别为r = 0.597, P = 0.00309和r = 0.551, P = 0.00849）。在自愿和电诱发的肌肉收缩特性之间没有发现其他显著的相关性，包括扭矩-频率关系的各种测量。尽管自发性和NMES肌肉收缩指数之间存在一定的关系，但这些结果充其量只是适度的良好相关。因此，这两种技术应被认为是互补的，而不是可互换的。

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