Journal of Applied Biomechanics最新文献_第6页

Rapid Change in the Direction of Hand Movement to Increase Hand Propulsion During Front Crawl Swimming. 快速改变手的运动方向以增加前爬泳时的手推进力。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-04-01 DOI: 10.1123/jab.2022-0106

Shigetada Kudo, Yuji Matsuda, Yoshihisa Sakurai, Yasushi Ikuta

{"title":"Rapid Change in the Direction of Hand Movement to Increase Hand Propulsion During Front Crawl Swimming.","authors":"Shigetada Kudo, Yuji Matsuda, Yoshihisa Sakurai, Yasushi Ikuta","doi":"10.1123/jab.2022-0106","DOIUrl":"https://doi.org/10.1123/jab.2022-0106","url":null,"abstract":"This study aims to investigate the difference in hand acceleration induced by rapid changes in hand movement directions and propulsion between fast and slow groups of swimmers during front crawl swimming. Twenty-two participants, consisting of 11 fast and 11 slow swimmers, performed front crawl swimming at their maximal effort. Hand acceleration and velocity and the angle of attack were measured using a motion capture system. The dynamic pressure approach was used to estimate hand propulsion. In the insweep phase, the fast group attained significantly higher hand acceleration than the slow group in the lateral and vertical directions (15.31 [3.44] m·s-2 vs 12.23 [2.60] m·s-2 and 14.37 [1.70] m·s-2 vs 12.15 [1.21] m·s-2), and the fast group exerted significantly larger hand propulsion than the slow group (53 [5] N vs 44 [7] N). Although the fast group attained large hand acceleration and propulsion during the insweep phase, the hand velocity and the angle of attack were not significantly different in the 2 groups. The rapid change in hand movement direction could be considered in the technique of underwater arm stroke, particularly in the vertical direction, to increase hand propulsion during front crawl swimming.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 2","pages":"90-98"},"PeriodicalIF":1.4,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9232390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Prelanding Knee Kinematics and Landing Kinetics During Single-Leg and Double-Leg Landings in Male and Female Recreational Athletes. 男女休闲运动员单腿和双腿着地时膝盖着地前运动学和着地动力学。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0147

Ling Li, Yu Song, Maddy Jenkins, Boyi Dai

{"title":"Prelanding Knee Kinematics and Landing Kinetics During Single-Leg and Double-Leg Landings in Male and Female Recreational Athletes.","authors":"Ling Li, Yu Song, Maddy Jenkins, Boyi Dai","doi":"10.1123/jab.2022-0147","DOIUrl":"https://doi.org/10.1123/jab.2022-0147","url":null,"abstract":"Biomechanical behavior prior to landing likely contributes to anterior cruciate ligament (ACL) injuries during jump-landing tasks. This study examined prelanding knee kinematics and landing ground reaction forces (GRFs) during single-leg and double-leg landings in males and females. Participants performed landings with the dominant leg or both legs while kinematic and GRF data were collected. Single-leg landings demonstrated less time between prelanding minimal knee flexion and initial ground contact, decreased prelanding and early-landing knee flexion angles and velocities, and increased peak vertical and posterior GRFs compared with double-leg landings. Increased prelanding knee flexion velocities and knee flexion excursion correlated with decreased peak posterior GRFs during both double-leg and single-leg landings. No significant differences were observed between males and females. Prelanding knee kinematics may contribute to the increased risk of ACL injuries in single-leg landings compared with double-leg landings. Future studies are encouraged to incorporate prelanding knee mechanics to understand ACL injury mechanisms and predict future ACL injury risks. Studies of the feasibility of increasing prelanding knee flexion are needed to understand the potential role of prelanding kinematics in decreasing ACL injury risk.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"34-41"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10582655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

A Minimal Sensor Inertial Measurement Unit System Is Replicable and Capable of Estimating Bilateral Lower-Limb Kinematics in a Stationary Bodyweight Squat and a Countermovement Jump. 一个最小传感器惯性测量单元系统是可复制的，能够估计在一个静止的体重深蹲和一个反动作跳跃的双边下肢运动学。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0168

AuraLea Fain, Benjamin Hindle, Jordan Andersen, Bradley C Nindl, Matthew B Bird, Joel T Fuller, Jodie A Wills, Tim L A Doyle

{"title":"A Minimal Sensor Inertial Measurement Unit System Is Replicable and Capable of Estimating Bilateral Lower-Limb Kinematics in a Stationary Bodyweight Squat and a Countermovement Jump.","authors":"AuraLea Fain, Benjamin Hindle, Jordan Andersen, Bradley C Nindl, Matthew B Bird, Joel T Fuller, Jodie A Wills, Tim L A Doyle","doi":"10.1123/jab.2022-0168","DOIUrl":"https://doi.org/10.1123/jab.2022-0168","url":null,"abstract":"This study aimed to validate a 7-sensor inertial measurement unit system against optical motion capture to estimate bilateral lower-limb kinematics. Hip, knee, and ankle sagittal plane peak angles and range of motion (ROM) were compared during bodyweight squats and countermovement jumps in 18 participants. In the bodyweight squats, left peak hip flexion (intraclass correlation coefficient [ICC] = .51), knee extension (ICC = .68) and ankle plantar flexion (ICC = .55), and hip (ICC = .63) and knee (ICC = .52) ROM had moderate agreement, and right knee ROM had good agreement (ICC = .77). Relatively higher agreement was observed in the countermovement jumps compared to the bodyweight squats, moderate to good agreement in right peak knee flexion (ICC = .73), and right (ICC = .75) and left (ICC = .83) knee ROM. Moderate agreement was observed for right ankle plantar flexion (ICC = .63) and ROM (ICC = .51). Moderate agreement (ICC > .50) was observed in all variables in the left limb except hip extension, knee flexion, and dorsiflexion. In general, there was poor agreement for peak flexion angles, and at least moderate agreement for joint ROM. Future work will aim to optimize methodologies to increase usability and confidence in data interpretation by minimizing variance in system-based differences and may also benefit from expanding planes of movement.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"42-53"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10592317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Sex Differences in Spatiotemporal Gait Parameters of Transtibial Amputees. 跨胫截肢者时空步态参数的性别差异。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0054

Tess M R Carswell, Brenton G Hordacre, Marc D Klimstra, Joshua W Giles

{"title":"Sex Differences in Spatiotemporal Gait Parameters of Transtibial Amputees.","authors":"Tess M R Carswell, Brenton G Hordacre, Marc D Klimstra, Joshua W Giles","doi":"10.1123/jab.2022-0054","DOIUrl":"https://doi.org/10.1123/jab.2022-0054","url":null,"abstract":"Research addressing lower limb amputee gait and prosthetic design often focuses on men, despite female lower limb amputees having different risk factors and lower success with their prosthetics overall. It is widely agreed that sex differences exist in able-bodied gait, but research analyzing sex differences in amputee gait is rare. This study compared male and female transtibial amputee gait to ascertain potential sex differences. Forty-five transtibial amputees were asked to walk at their self-selected speed, and spatiotemporal gait data were obtained. Both the mean and variability metric of parameters were analyzed for 10 male and 10 female participants. For all participants, amputated limbs had a shorter stance time, longer swing time, and larger step length. Females had a 10% shorter stance time and 26% larger normalized step and stride length than males. Female participants also walked over 20% faster than male participants. Finally, significant interactions were found in the mean and variability metric of stride velocity, indicating greater variability in women. These findings suggest that sex differences exist in transtibial amputee gait, offering possible explanations for the different comorbidities experienced by female lower limb amputees. These results have major implications for female amputees and for sex-specific research, rehabilitation, and prosthetic design.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"1-9"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10590791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Effects of Increasing Trunk Flexion During Stair Ascent on the Rate and Magnitude of Achilles Tendon Force in Asymptomatic Females. 无症状女性上楼梯时增加躯干屈曲对跟腱力的速率和大小的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0165

Lee T Atkins, Michael Lowrey, Sarah Reagor, Kirsten Walker, Dhalston Cage

{"title":"The Effects of Increasing Trunk Flexion During Stair Ascent on the Rate and Magnitude of Achilles Tendon Force in Asymptomatic Females.","authors":"Lee T Atkins, Michael Lowrey, Sarah Reagor, Kirsten Walker, Dhalston Cage","doi":"10.1123/jab.2022-0165","DOIUrl":"https://doi.org/10.1123/jab.2022-0165","url":null,"abstract":"Research indicates that increasing trunk flexion may optimize patellofemoral joint loading. However, this postural change could cause an excessive Achilles tendon force (ATF) and injury risk during movement. This study aimed to examine the effects of increasing trunk flexion during stair ascent on ATF, ankle biomechanics, and vertical ground reaction force in females. Twenty asymptomatic females (age: 23.4 [2.5] y; height: 1.6 [0.8] m; mass: 63.0 [12.2] kg) ascended stairs using their self-selected and flexed trunk postures. Compared with the self-selected trunk condition, decreases were observed for peak ATF (mean differences [MD] = 0.14 N/kg; 95% confidence interval [CI], 0.06 to 0.23; Cohen d = -1.2; P = .003), average rate of ATF development (MD = 0.25 N/kg/s; 95% CI, 0.07 to 0.43; Cohen d = -0.9; P = .010), ankle plantar flexion moment (MD = 0.08 N·m/kg; 95% CI, 0.03 to 0.13; Cohen d = -1.1; P = .005), and vertical ground reaction force (MD = 38.6 N/kg; 95% CI, 20.3 to 56.90; Cohen d = -1.8; P < .001). Increasing trunk flexion did not increase ATF. Instead, this postural change was associated with a decreased ATF rate and magnitude and may benefit individuals with painful Achilles tendinopathy.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"10-14"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10588312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

The Effect of Foot Position and Lean Mass on Jumping and Landing Mechanics in Collegiate Dancers. 足位和瘦质量对大学生舞蹈运动员起跳和落地力学的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2021-0319

Chris J Alfiero, Ann F Brown, Youngmin Chun, Alexandra Holmes, Joshua P Bailey

{"title":"The Effect of Foot Position and Lean Mass on Jumping and Landing Mechanics in Collegiate Dancers.","authors":"Chris J Alfiero, Ann F Brown, Youngmin Chun, Alexandra Holmes, Joshua P Bailey","doi":"10.1123/jab.2021-0319","DOIUrl":"https://doi.org/10.1123/jab.2021-0319","url":null,"abstract":"The purpose of this study was to investigate the effects of foot positioning and lean mass on jumping and landing mechanics in collegiate dancers. Thirteen dancers performed 3 unilateral and bilateral vertical jumps with feet in neutral and turnout positions. Dual-energy x-ray absorptiometry scans, jump height, vertical stiffness, and joint stiffness were assessed for relationships between foot positions. Jump heights were greater in right compared with left limb (P = .029) and neutral compared with turnout (P = .020) during unilateral jumping. In unilateral landing, knee stiffness was greater in turnout compared with neutral (P = .004) during the loading phase. Jump height (P < .001) was significantly increased, and vertical stiffness (P = .003) was significantly decreased during bilateral jumping in neutral compared with turnout. Significantly increased hip stiffness during the attenuation phase was observed in neutral compared with turnout (P = .006). Left-limb lean mass was significantly less than the right limb (P < .05). Adjustments for bilateral jumping were focused on hip stiffness, whereas there was a slight shift to knee strategy for unilateral jump.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"15-21"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10588313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Pelvic Rotation Is Associated With Asymmetry in the Knee Extensor Moment During Double-Leg Squatting After Anterior Cruciate Ligament Reconstruction. 骨盆旋转与前交叉韧带重建后双腿深蹲时膝关节伸肌力矩不对称有关。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0204

Tomoya Ishida, Mina Samukawa, Yuta Koshino, Takumi Ino, Satoshi Kasahara, Harukazu Tohyama

{"title":"Pelvic Rotation Is Associated With Asymmetry in the Knee Extensor Moment During Double-Leg Squatting After Anterior Cruciate Ligament Reconstruction.","authors":"Tomoya Ishida, Mina Samukawa, Yuta Koshino, Takumi Ino, Satoshi Kasahara, Harukazu Tohyama","doi":"10.1123/jab.2022-0204","DOIUrl":"https://doi.org/10.1123/jab.2022-0204","url":null,"abstract":"Asymmetry in knee extensor moment during double-leg squatting was observed after anterior cruciate ligament reconstruction, even after the completion of the rehabilitation program for return to sports. The purpose of this study was to clarify the association between asymmetry in the knee extensor moment and pelvic rotation angle during double-leg squatting after anterior cruciate ligament reconstruction. Twenty-four participants performed double-leg squatting. Kinetics and kinematics during squatting were analyzed using a 3-dimensional motion analysis system with 2 force plates. The limb symmetry index of knee extensor moment was predicted by the pelvic rotation angle (R2 = .376, P = .001). In addition, the pelvic rotation and the limb symmetry index of the vertical ground reaction force independently explained the limb symmetry index of the knee extensor moment (R2 = .635, P < .001, β of pelvic rotation = -0.489, β of vertical ground reaction force = 0.524). Pelvic rotation toward the involved limb was associated with a smaller knee extensor moment in the involved limb than in the uninvolved limb. The assessment of pelvic rotation would be useful for partially predicting asymmetry in the knee extensor moment during double-leg squatting. Minimizing pelvic rotation may improve the asymmetry in the knee extensor moment during double-leg squatting after anterior cruciate ligament reconstruction.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"62-68"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10589364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

A Statistical Parametric Mapping Analysis Approach for the Evaluation of a Passive Back Support Exoskeleton on Mechanical Loading During a Simulated Patient Transfer Task. 在模拟病人转移任务中评估被动背支撑外骨骼机械负荷的统计参数映射分析方法。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0126

Unai Latorre Erezuma, Maialen Zelaia Amilibia, Ander Espin Elorza, Camilo Cortés, Jon Irazusta, Ana Rodriguez-Larrad

{"title":"A Statistical Parametric Mapping Analysis Approach for the Evaluation of a Passive Back Support Exoskeleton on Mechanical Loading During a Simulated Patient Transfer Task.","authors":"Unai Latorre Erezuma, Maialen Zelaia Amilibia, Ander Espin Elorza, Camilo Cortés, Jon Irazusta, Ana Rodriguez-Larrad","doi":"10.1123/jab.2022-0126","DOIUrl":"https://doi.org/10.1123/jab.2022-0126","url":null,"abstract":"This study assessed the effectiveness of a passive back support exoskeleton during a mechanical loading task. Fifteen healthy participants performed a simulated patient transfer task while wearing the Laevo (version 2.5) passive back support exoskeleton. Collected metrics encompassed L5-S1 joint moments, back and abdominal muscle activity, lower body and back kinematics, center of mass displacement, and movement smoothness. A statistical parametric mapping analysis approach was used to overcome limitations from discretization of continuous data. The exoskeleton reduced L5-S1 joint moments during trunk flexion, but wearing the device restricted L5-S1 joint flexion when flexing the trunk as well as hip and knee extension, preventing participants from standing fully upright. Moreover, wearing the device limited center of mass motion in the caudal direction and increased its motion in the anterior direction. Therefore, wearing the exoskeleton partly reduced lower back moments during the lowering phase of the patient transfer task, but there were some undesired effects such as altered joint kinematics and center of mass displacement. Statistical parametric mapping analysis was useful in determining the benefits and hindrances produced by wearing the exoskeleton while performing the simulated patient transfer task and should be utilized in further studies to inform design and appropriate usage.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"22-33"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10589363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Left-Right Differential Erector Spinae Muscles Activation in Prone and Quadruped Positions. 俯卧位和四足位的左右差异竖脊肌激活。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0047

Nader Farahpour, Mahboube Alemzadeh, Mehri Mohammadi, Mohammadreza Rezaie, Paul Allard

{"title":"Left-Right Differential Erector Spinae Muscles Activation in Prone and Quadruped Positions.","authors":"Nader Farahpour, Mahboube Alemzadeh, Mehri Mohammadi, Mohammadreza Rezaie, Paul Allard","doi":"10.1123/jab.2022-0047","DOIUrl":"https://doi.org/10.1123/jab.2022-0047","url":null,"abstract":"Left-right differential erector spinae (ES) muscle strengthening is required to correct ES muscle imbalances. The objective was to test the effect of 6 body positions on the differential activation of the ES muscles. In 14 able-bodied young women, using a surface electromyography system, the bilateral ES muscles activity at the third lumbar (ESL3) and the 10th (EST10) and 6th (EST6) thoracic vertebral levels was measured with the contralateral arm and leg lifted in the prone and quadruped conditions and with a single arm lifted in the quadruped position. Results showed that the activity of the ESL3 was symmetrical (P > .05) and significantly smaller than that of the thoracic ES muscles in all body positions (P < .01). The EST10 and EST6 were differentially activated in all tests (P < .001). Besides, the differential activation was higher in the contralateral-arm and -leg lift in the quadruped position than in the other positions. In conclusion, contralateral-arm and -leg lift and single-arm lift in the quadruped and prone positions are capable of differentially activating the ES muscles on one side more than the other side. Further studies are recommended to examine the effectiveness of these exercises on the correction of ES muscle imbalances in clinical populations.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"54-61"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10582654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Differences in Knee Extensors' Muscle-Tendon Unit Passive Stiffness, Architecture, and Force Production in Competitive Cyclists Versus Runners. 在竞技自行车运动员和跑步运动员中，膝关节伸肌-肌腱单元被动刚度、结构和力量产生的差异。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-11-16 Print Date: 2022-12-01 DOI: 10.1123/jab.2022-0072

Leonardo Cesanelli, Sigitas Kamandulis, Nerijus Eimantas, Danguole Satkunskiene

{"title":"Differences in Knee Extensors' Muscle-Tendon Unit Passive Stiffness, Architecture, and Force Production in Competitive Cyclists Versus Runners.","authors":"Leonardo Cesanelli, Sigitas Kamandulis, Nerijus Eimantas, Danguole Satkunskiene","doi":"10.1123/jab.2022-0072","DOIUrl":"https://doi.org/10.1123/jab.2022-0072","url":null,"abstract":"To describe the possible effects of chronic specific exercise training, the present study compared the anthropometric variables, muscle-tendon unit (MTU) architecture, passive stiffness, and force production capacity between a group of competitive cyclists and runners. Twenty-seven competitive male cyclists (n = 16) and runners (n = 11) participated. B-mode ultrasound evaluation of the vastus lateralis muscle and patellar tendon as well as passive stiffness of the knee extensors MTU were assessed. The athletes then performed a test of knee extensor maximal voluntary isometric contractions. Cyclists displayed greater thigh girths, vastus lateralis pennation angle and muscle thickness, patellar tendon cross-sectional area, and MTU passive stiffness than runners (P < .05). Knee extensor force production capacity also differed significantly, with cyclists showing greater values compared with runners (P < .05). Overall, the direct comparison of these 2 populations revealed specific differences in the MTU, conceivably related to the chronic requirements imposed through the training for the different disciplines.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"412-423"},"PeriodicalIF":1.4,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40482911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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