J. Cavalcante, R. C. Marqueti, P. Corrigan, Alessandra Martins Melo Sousa, M. Bottaro, N. Babault, J. M. Geremia, K. Silbernagel, J. Durigan
Quadriceps neuromuscular electrical stimulation (NMES) may stimulate patellar tendon remodeling and recovery, but it is unclear if hip and knee joint angles during NMES affect patellar tendon loading. Therefore, the purpose of this study was to evaluate the effects of hip and knee joint angles on patellar tendon properties during quadriceps NMES. Twenty healthy men performed quadriceps NMES in supine with 60º of knee flexion (SUP60), seated with 60º of knee flexion (SIT60), supine with 20º of knee flexion (SUP20), and seated with 20º of knee flexion (SIT20). Patellar tendon mechanical and material properties were determined during maximum quadriceps evoked contraction. Patellar tendon force, stress, and stiffness were greater for SUP60 and SIT60 compared to SUP20 and SIT20. Young's modulus was greater for SUP60 and SIT60 compared to SIT20. Tendon elongation, strain, resting length, and average CSA were not different between conditions. In conclusion, during quadriceps NMES, the patellar tendon is loaded more when the knee is flexed to 60º compared to 20º. These findings suggest that clinicians should favor 60º of knee flexion over 20º during NMES when the goal is to load the patellar tendon. Further research is needed to determine optimal positioning for maximal patellar tendon loading.
{"title":"The effects of knee and hip joint angles on patellar tendon loading during quadriceps neuromuscular electrical stimulation","authors":"J. Cavalcante, R. C. Marqueti, P. Corrigan, Alessandra Martins Melo Sousa, M. Bottaro, N. Babault, J. M. Geremia, K. Silbernagel, J. Durigan","doi":"10.1002/tsm2.260","DOIUrl":"https://doi.org/10.1002/tsm2.260","url":null,"abstract":"Quadriceps neuromuscular electrical stimulation (NMES) may stimulate patellar tendon remodeling and recovery, but it is unclear if hip and knee joint angles during NMES affect patellar tendon loading. Therefore, the purpose of this study was to evaluate the effects of hip and knee joint angles on patellar tendon properties during quadriceps NMES. Twenty healthy men performed quadriceps NMES in supine with 60º of knee flexion (SUP60), seated with 60º of knee flexion (SIT60), supine with 20º of knee flexion (SUP20), and seated with 20º of knee flexion (SIT20). Patellar tendon mechanical and material properties were determined during maximum quadriceps evoked contraction. Patellar tendon force, stress, and stiffness were greater for SUP60 and SIT60 compared to SUP20 and SIT20. Young's modulus was greater for SUP60 and SIT60 compared to SIT20. Tendon elongation, strain, resting length, and average CSA were not different between conditions. In conclusion, during quadriceps NMES, the patellar tendon is loaded more when the knee is flexed to 60º compared to 20º. These findings suggest that clinicians should favor 60º of knee flexion over 20º during NMES when the goal is to load the patellar tendon. Further research is needed to determine optimal positioning for maximal patellar tendon loading.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.260","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43298102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anne-Laure Ménard, M. Begon, Justin Barrette, Benjamin A Green, L. Ballaz, M. Nault
The aim of this study was to determine whether risk factors for foot or ankle injuries could be identified using quantitative foot measurements. Male and female soccer players of all levels from 9 to 40 years old were included in this cross‐sectional study. Soccer history, foot and ankle function and injury history were investigated. Foot symmetry, length and arch height flexibility and plantar pressure captured with a mat were measured. All variables showing a significant correlation (P ≤ .05) and the presence of at least one foot or ankle injury were integrated into a multivariate logistic regression model using forward stepwise selection. We recruited 277 players (196 males), and 79 participants had sustained at least one foot or ankle soccer‐related injury. The significant variables were as follows: age, gender, pressure on the lateral heel and on the fourth and fifth metatarsals. Based on the model, the area under the ROC curve was 81.2%. To achieve a specificity of 80%, the corresponding sensitivity was 72.2%. Plantar pressure measurements can objectively assess foot alignment. Increased pressure on the lateral heel and fourth and fifth metatarsal cavovarus foot type represent a risk factor for foot and ankle injuries in soccer. Level of evidence: IV.
{"title":"Plantar pressure analysis: Identifying risk of foot and ankle injury in soccer players","authors":"Anne-Laure Ménard, M. Begon, Justin Barrette, Benjamin A Green, L. Ballaz, M. Nault","doi":"10.1002/tsm2.253","DOIUrl":"https://doi.org/10.1002/tsm2.253","url":null,"abstract":"The aim of this study was to determine whether risk factors for foot or ankle injuries could be identified using quantitative foot measurements. Male and female soccer players of all levels from 9 to 40 years old were included in this cross‐sectional study. Soccer history, foot and ankle function and injury history were investigated. Foot symmetry, length and arch height flexibility and plantar pressure captured with a mat were measured. All variables showing a significant correlation (P ≤ .05) and the presence of at least one foot or ankle injury were integrated into a multivariate logistic regression model using forward stepwise selection. We recruited 277 players (196 males), and 79 participants had sustained at least one foot or ankle soccer‐related injury. The significant variables were as follows: age, gender, pressure on the lateral heel and on the fourth and fifth metatarsals. Based on the model, the area under the ROC curve was 81.2%. To achieve a specificity of 80%, the corresponding sensitivity was 72.2%. Plantar pressure measurements can objectively assess foot alignment. Increased pressure on the lateral heel and fourth and fifth metatarsal cavovarus foot type represent a risk factor for foot and ankle injuries in soccer. Level of evidence: IV.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45230530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The incidence of Achilles tendon rupture (ATR) is increasing and at least 20% do not return to preinjury activity. The aim of the study was to evaluate biomechanical differences between those assigned to a Fear group and No‐Fear group based on fear of reinjury during activity after ATR, by evaluating a drop countermovement jump. Twenty‐five participants were evaluated 23.5 months after ATR. Peak values for eccentric and concentric joint power were identified for ankles, knees, and hips. Participants were assigned to Fear group or No‐Fear group depending on their answers to a question regarding fear of reinjury during activities. Interlimb peak power was compared between groups for landing and push‐off with a mixed model ANOVA. Compared to the No‐fear group, the Fear group presented significant decreased power in the ankle (P < .001) but increased power in the knee (P < .001) in involved limb during both phases. A 3‐way interaction was found between group, side, and phase for frontal plane hip power (P < .001). Our findings indicate that those who are afraid of reinjury demonstrate higher interlimb differences compared to those who are not. They also compensate for ankle deficits with greater knee and hip power.
{"title":"The effect of fear of reinjury on joint power distribution during a drop countermovement jump two years after an Achilles tendon rupture","authors":"U. Jónsdóttir, K. Briem, R. Tranberg, A. Brorsson","doi":"10.1002/tsm2.261","DOIUrl":"https://doi.org/10.1002/tsm2.261","url":null,"abstract":"The incidence of Achilles tendon rupture (ATR) is increasing and at least 20% do not return to preinjury activity. The aim of the study was to evaluate biomechanical differences between those assigned to a Fear group and No‐Fear group based on fear of reinjury during activity after ATR, by evaluating a drop countermovement jump. Twenty‐five participants were evaluated 23.5 months after ATR. Peak values for eccentric and concentric joint power were identified for ankles, knees, and hips. Participants were assigned to Fear group or No‐Fear group depending on their answers to a question regarding fear of reinjury during activities. Interlimb peak power was compared between groups for landing and push‐off with a mixed model ANOVA. Compared to the No‐fear group, the Fear group presented significant decreased power in the ankle (P < .001) but increased power in the knee (P < .001) in involved limb during both phases. A 3‐way interaction was found between group, side, and phase for frontal plane hip power (P < .001). Our findings indicate that those who are afraid of reinjury demonstrate higher interlimb differences compared to those who are not. They also compensate for ankle deficits with greater knee and hip power.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.261","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48207836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
W. Gowers, G. Evans, Jane Carré, Matt Ashman, A. Jackson, J. Hopker, J. Dickinson
This study investigated the use of eucapnic voluntary hyperpnea (EVH) to monitor efficacy of pharmacological therapy in elite swimmers with exercise‐induced bronchoconstriction (EIB). Secondly, it evaluated the long‐term test‐retest repeatability of EVH in this population.
{"title":"Eucapnic voluntary hyperpnea challenge can support management of exercise‐induced bronchoconstriction in elite swimmers","authors":"W. Gowers, G. Evans, Jane Carré, Matt Ashman, A. Jackson, J. Hopker, J. Dickinson","doi":"10.1002/tsm2.258","DOIUrl":"https://doi.org/10.1002/tsm2.258","url":null,"abstract":"This study investigated the use of eucapnic voluntary hyperpnea (EVH) to monitor efficacy of pharmacological therapy in elite swimmers with exercise‐induced bronchoconstriction (EIB). Secondly, it evaluated the long‐term test‐retest repeatability of EVH in this population.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.258","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43186820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zachary M. Gillen, M. McHugh, Marni E. Shoemaker, J. Cramer
The purposes of this study were to determine whether countermovement jump (CMJ) force profiles differ for jumps in which peak force occurred at the low position of the countermovement (LP) compared to jumps in which peak force did not occur at the low position of the countermovement (NLP), and compare relationships among CMJ and isokinetic metrics between groups. Thirty‐nine male and female youth athletes between 9‐ and 17‐year‐old participated. Participants completed CMJs and isokinetic knee extensions from 60 to 300°·s−1. Ground reaction forces were collected during CMJs to quantify unweighting, braking, propulsive, and performance metrics. Torque and power were quantified during all isokinetic knee extensions. Forty‐one percent of participants had LP force profiles, while 59% of participants had NLP force profiles. The LP group had more efficient unweighting and braking phase metrics than the NLP group, while the NLP group had greater isokinetic torque and power, and greater relationships between CMJ and isokinetic metrics, than the LP group. CMJs from the LP group represent more biomechanically efficient jumps than CMJs from the NLP group. Additionally, the NLP group may be more reliant on concentric force production during the CMJ, while the LP group may have more efficient storage and utilization of elastic energy.
{"title":"Comparisons of countermovement jump force profiles in youth athletes","authors":"Zachary M. Gillen, M. McHugh, Marni E. Shoemaker, J. Cramer","doi":"10.1002/tsm2.257","DOIUrl":"https://doi.org/10.1002/tsm2.257","url":null,"abstract":"The purposes of this study were to determine whether countermovement jump (CMJ) force profiles differ for jumps in which peak force occurred at the low position of the countermovement (LP) compared to jumps in which peak force did not occur at the low position of the countermovement (NLP), and compare relationships among CMJ and isokinetic metrics between groups. Thirty‐nine male and female youth athletes between 9‐ and 17‐year‐old participated. Participants completed CMJs and isokinetic knee extensions from 60 to 300°·s−1. Ground reaction forces were collected during CMJs to quantify unweighting, braking, propulsive, and performance metrics. Torque and power were quantified during all isokinetic knee extensions. Forty‐one percent of participants had LP force profiles, while 59% of participants had NLP force profiles. The LP group had more efficient unweighting and braking phase metrics than the NLP group, while the NLP group had greater isokinetic torque and power, and greater relationships between CMJ and isokinetic metrics, than the LP group. CMJs from the LP group represent more biomechanically efficient jumps than CMJs from the NLP group. Additionally, the NLP group may be more reliant on concentric force production during the CMJ, while the LP group may have more efficient storage and utilization of elastic energy.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44758859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Barendrecht, C. Barten, B. Smits-Engelsman, W. Mechelen, E. Verhagen
To identify primary target groups for injury prevention in physical education teacher education (PETE) students, risk differences between subgroups by sex and curriculum years were compared in a retrospective cohort study (2000‐2014). Injuries recorded by healthcare professionals at the medical facility of a Dutch PETE college were used to calculate overall, intra‐ and extracurricular injury prevalence per sex, curriculum years, and semesters and to compare these by logistic regression analyses. Of 1083 PETE students, 599 (55.3%) reported at least one injury during their curriculum (60.0% intracurricular). Female students had a higher risk for overall (OR 2.29, 95%CI 1.77‐2.96) and for intracurricular injuries (OR 3.12, 95%CI 2.41‐4.03), but not for extracurricular injuries. Compared to the freshman year, injury risk dropped during the consecutive years (OR 0.56, 95%CI 0.46‐0.67; OR 0.33, 95%CI 0.27‐0.41; OR 0.04, 95%CI 0.03‐0.07, respectively). The first semesters of the freshman and second year showed higher injury prevalence compared to two out of three consecutive semesters (P < .006). Primary target groups for injury preventive measures are freshman and female PETE students. Factors contributing to the predominantly higher intracurricular injury risks, most notably in female students, need to be investigated in prospective cohort studies, regardless of sex.
{"title":"A retrospective analysis of injury risk in physical education teacher education students between 2000‐2014","authors":"M. Barendrecht, C. Barten, B. Smits-Engelsman, W. Mechelen, E. Verhagen","doi":"10.1002/tsm2.256","DOIUrl":"https://doi.org/10.1002/tsm2.256","url":null,"abstract":"To identify primary target groups for injury prevention in physical education teacher education (PETE) students, risk differences between subgroups by sex and curriculum years were compared in a retrospective cohort study (2000‐2014). Injuries recorded by healthcare professionals at the medical facility of a Dutch PETE college were used to calculate overall, intra‐ and extracurricular injury prevalence per sex, curriculum years, and semesters and to compare these by logistic regression analyses. Of 1083 PETE students, 599 (55.3%) reported at least one injury during their curriculum (60.0% intracurricular). Female students had a higher risk for overall (OR 2.29, 95%CI 1.77‐2.96) and for intracurricular injuries (OR 3.12, 95%CI 2.41‐4.03), but not for extracurricular injuries. Compared to the freshman year, injury risk dropped during the consecutive years (OR 0.56, 95%CI 0.46‐0.67; OR 0.33, 95%CI 0.27‐0.41; OR 0.04, 95%CI 0.03‐0.07, respectively). The first semesters of the freshman and second year showed higher injury prevalence compared to two out of three consecutive semesters (P < .006). Primary target groups for injury preventive measures are freshman and female PETE students. Factors contributing to the predominantly higher intracurricular injury risks, most notably in female students, need to be investigated in prospective cohort studies, regardless of sex.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.256","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43416690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Andrey Nezhentsev, Roxanna E Abhari, Mathew J Baldwin, Jolet Y Mimpen, Edyta Augustyniak, Mark Isaacs, Pierre-Alexis Mouthuy, Andrew J Carr, Sarah J B Snelling
Recurrent tears after surgical tendon repair remain common. Repair failures can be partly attributed to the use of sutures not designed for the tendon cellular niche nor for the promotion of repair processes. Synthetic electrospun materials can mechanically support the tendon whilst providing topographical cues that regulate cell behaviour. Here, a novel electrospun suture made from twisted polydioxanone (PDO) polymer filaments is compared to PDS II, a clinically-used PDO suture currently utilised in tendon repair. We evaluated the ability of these sutures to support the attachment and proliferation of human tendon-derived stromal cells using PrestoBlue and Scanning Electron Microscopy. Suture surface chemistry was analysed using X-ray Photoelectron Spectroscopy. Bulk RNA-Seq interrogated the transcriptional response of primary tendon-derived stromal cells to sutures after 14 days. Electrospun suture showed increased initial cell attachment and a stronger transcriptional response compared to PDS II, with relative enrichment of pathways including mTorc1 signalling and depletion of epithelial mesenchymal transition. Neither suture induced transcriptional upregulation of inflammatory pathways compared to baseline. Twisted electrospun sutures therefore show promise in improving outcomes in surgical tendon repair by allowing increased cell attachment whilst maintaining an appropriate tissue response.
{"title":"<i>In vitro</i> evaluation of the response of human tendon-derived stromal cells to a novel electrospun suture for tendon repair.","authors":"Andrey Nezhentsev, Roxanna E Abhari, Mathew J Baldwin, Jolet Y Mimpen, Edyta Augustyniak, Mark Isaacs, Pierre-Alexis Mouthuy, Andrew J Carr, Sarah J B Snelling","doi":"10.1002/tsm2.233","DOIUrl":"https://doi.org/10.1002/tsm2.233","url":null,"abstract":"<p><p>Recurrent tears after surgical tendon repair remain common. Repair failures can be partly attributed to the use of sutures not designed for the tendon cellular niche nor for the promotion of repair processes. Synthetic electrospun materials can mechanically support the tendon whilst providing topographical cues that regulate cell behaviour. Here, a novel electrospun suture made from twisted polydioxanone (PDO) polymer filaments is compared to PDS II, a clinically-used PDO suture currently utilised in tendon repair. We evaluated the ability of these sutures to support the attachment and proliferation of human tendon-derived stromal cells using PrestoBlue and Scanning Electron Microscopy. Suture surface chemistry was analysed using X-ray Photoelectron Spectroscopy. Bulk RNA-Seq interrogated the transcriptional response of primary tendon-derived stromal cells to sutures after 14 days. Electrospun suture showed increased initial cell attachment and a stronger transcriptional response compared to PDS II, with relative enrichment of pathways including mTorc1 signalling and depletion of epithelial mesenchymal transition. Neither suture induced transcriptional upregulation of inflammatory pathways compared to baseline. Twisted electrospun sutures therefore show promise in improving outcomes in surgical tendon repair by allowing increased cell attachment whilst maintaining an appropriate tissue response.</p>","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.233","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9520161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Jørgensen, J. Bojsen-Møller, Thue Skalgard, H. B. Olsen, P. Aagaard
The aim was to develop a Drop Jump (DJ) protocol on dual force plate recordings (Dual Force Plate method: DFPM) to assess lower limb power production and quantify impact loading, and range of body center of mass (BCM) excursion during human DJ, and to examine if single‐plate analysis (Reverse Integration Method: RIM) was a valid alternative. Nineteen male subjects performed DJs from an elevated platform (48 cm). Kinematic (BCM displacement and velocity, rebound jump height) and kinetic (BCM power, work, rate of force development (RFD), lower limb stiffness (LLS)) variables were obtained by force plate recording during the drop take‐off phase (DFPM) and rebound phase (RIM, DFPM). DFPM and RIM did not differ at the group level for any outcome parameter. However, large intra‐individual differences in BCM displacement were observed between DFPM and RIM (CV 9‐10%) as well as for rebound jump height, LLS, and work performed on BCM (CV 9.8‐14%). A majority of the remaining variables demonstrated low intra‐individual variability between the two methods (r= 0.73‐0.96, CV 1‐5%). In conclusion, No systematic differences were revealed between DFPM and RIM, suggesting that RIM is a valid approach for assessing DJ performance. Substantial between‐method intra‐individual variability was noted for key outcome parameters.
{"title":"Dual vs single force plate analysis of human drop jumping","authors":"S. Jørgensen, J. Bojsen-Møller, Thue Skalgard, H. B. Olsen, P. Aagaard","doi":"10.1002/tsm2.255","DOIUrl":"https://doi.org/10.1002/tsm2.255","url":null,"abstract":"The aim was to develop a Drop Jump (DJ) protocol on dual force plate recordings (Dual Force Plate method: DFPM) to assess lower limb power production and quantify impact loading, and range of body center of mass (BCM) excursion during human DJ, and to examine if single‐plate analysis (Reverse Integration Method: RIM) was a valid alternative. Nineteen male subjects performed DJs from an elevated platform (48 cm). Kinematic (BCM displacement and velocity, rebound jump height) and kinetic (BCM power, work, rate of force development (RFD), lower limb stiffness (LLS)) variables were obtained by force plate recording during the drop take‐off phase (DFPM) and rebound phase (RIM, DFPM). DFPM and RIM did not differ at the group level for any outcome parameter. However, large intra‐individual differences in BCM displacement were observed between DFPM and RIM (CV 9‐10%) as well as for rebound jump height, LLS, and work performed on BCM (CV 9.8‐14%). A majority of the remaining variables demonstrated low intra‐individual variability between the two methods (r= 0.73‐0.96, CV 1‐5%). In conclusion, No systematic differences were revealed between DFPM and RIM, suggesting that RIM is a valid approach for assessing DJ performance. Substantial between‐method intra‐individual variability was noted for key outcome parameters.","PeriodicalId":75247,"journal":{"name":"Translational sports medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/tsm2.255","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42374139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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