Journal of Applied Biomechanics最新文献_第6页

Comparative Analysis of Muscle Coordination Patterns During Squatting in Trained and Untrained Individuals. 训练和未训练个体下蹲时肌肉协调模式的比较分析。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-01-21 Print Date: 2026-04-01 DOI: 10.1123/jab.2024-0247

Yushin Kim

{"title":"Comparative Analysis of Muscle Coordination Patterns During Squatting in Trained and Untrained Individuals.","authors":"Yushin Kim","doi":"10.1123/jab.2024-0247","DOIUrl":"10.1123/jab.2024-0247","url":null,"abstract":"Squatting, a closed-kinetic chain exercise, requires the complex coordination of multiple muscles. However, the differences in muscle coordination patterns between individuals with varying levels of exercise proficiency remain unclear. This study aimed to compare muscle coordination patterns during the squat exercise between trained and untrained individuals. Sixteen participants, classified into trained and untrained groups, performed 20 repetitive squats while both motion capture and electromyography data were recorded. Muscle synergy analysis was employed to identify muscle coordination patterns, and cluster analysis was used to determine preferred muscle synergies within each group. The findings indicate that trained individuals exhibit muscle synergies characterized by the coactivation of trunk and leg muscles near the bottom position of the squat. By contrast, untrained individuals primarily show coactivation of leg muscles only. Motion analysis further revealed that trained participants maintained a more upright posture during this phase compared with untrained participants. The distinct muscle synergies between trained and untrained individuals suggest the importance of coordinated trunk and leg muscle activation in maintaining postural control near the bottom position, where the movement transitions from descent to ascent. These insights can inform training strategies to promote effective trunk-leg coordination and postural control in untrained individuals.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"122-130"},"PeriodicalIF":1.6,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031612","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

A Functional Sensor-to-Segment Calibration Method Reduces the Effects of Varied Sensor Placement on Estimates of Segment Angular Excursion. 一种功能传感器到线段的校准方法减少了传感器位置变化对线段角偏移估计的影响。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-01-19 Print Date: 2026-04-01 DOI: 10.1123/jab.2025-0073

Julien A Mihy, Mayumi Wagatsuma, Stephen M Cain, Jocelyn F Hafer

{"title":"A Functional Sensor-to-Segment Calibration Method Reduces the Effects of Varied Sensor Placement on Estimates of Segment Angular Excursion.","authors":"Julien A Mihy, Mayumi Wagatsuma, Stephen M Cain, Jocelyn F Hafer","doi":"10.1123/jab.2025-0073","DOIUrl":"10.1123/jab.2025-0073","url":null,"abstract":"To collect reliable data, it is important to determine how inertial measurement unit (IMU) sensor placement affects measurements of segment motion. We aimed to determine the extent to which a functional sensor-to-segment calibration method minimizes the effect of variations in sensor placement on IMU-derived segment angular excursions. Twenty healthy adults walked while wearing 3 IMUs placed on each of the pelvis, thigh, shank, and foot. Differences in estimated segment angular excursions between sensor placements were compared between an assumed sensor-to-segment calibration and 2 versions of a walking-based functional sensor-to-segment calibration. The performance of the functional calibration methods varied. The shank had the greatest difference in root mean square difference between methods (15° for assumed, 1.5° for functional calibration), but the pelvis and thigh did not have significant differences in root mean square difference between assumed and functional calibrations. Mean root mean square differences for angular excursion between sensors were <5° for most comparisons for assumed and functional calibrations. Functional calibration reduced between-subject variance in intersensor differences for all segments. Functional calibration can minimize the effect of variations in IMU sensor placement, but care should be taken to select sensor placements that minimize soft-tissue artifact (eg, anterior thigh).","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"131-139"},"PeriodicalIF":1.6,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13250779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

People With Marfan Syndrome Utilize an Ankle Dominant Strategy to Perform the Sit-to-Stand Task. 马凡氏综合征患者利用脚踝优势策略执行坐立任务。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-01-12 Print Date: 2026-04-01 DOI: 10.1123/jab.2025-0008

Justin M Pol, Mariana V Jacobs, Christopher J McLouth, Brecca M M Gaffney, Mary Sheppard, Michael A Samaan

{"title":"People With Marfan Syndrome Utilize an Ankle Dominant Strategy to Perform the Sit-to-Stand Task.","authors":"Justin M Pol, Mariana V Jacobs, Christopher J McLouth, Brecca M M Gaffney, Mary Sheppard, Michael A Samaan","doi":"10.1123/jab.2025-0008","DOIUrl":"10.1123/jab.2025-0008","url":null,"abstract":"Marfan syndrome (MFS) is a connective tissue disorder caused by structural changes in fibrillin-1 and is associated with muscle weakness and joint pain. The understanding of lower extremity (LE) joint mechanics associated with joint pain in people with MFS is limited. The goal of this study was to assess LE joint mechanics during the sit-to-stand (STS) task in people with MFS compared with asymptomatic controls. Sixteen people with MFS and 16 sex- and body mass index-matched controls were tested in this study. All participants performed the STS task at a self-selected speed. Peak LE joint extensor moments, moment impulses, moment durations, time to task completion, total support moment (TSM), and each joint's contribution to the TSM were evaluated. People with MFS took longer to perform the task and exhibited lower peak knee extensor moments and higher peak ankle plantar flexor moments compared with controls. Higher LE joint extensor moments impulses and moment durations were observed in people with MFS. People with MFS performed the STS task using a higher TSM with higher ankle contributions to the TSM. People with MFS exhibit altered LE joint mechanics during the STS task and utilize a more ankle joint dominant strategy.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"102-107"},"PeriodicalIF":1.6,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12952232/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Form and Function: Stronger Toes and Shorter Heels Associate With Better Gait Performance. 形态和功能：更强的脚趾和更短的脚跟与更好的步态表现有关。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-01-12 Print Date: 2026-04-01 DOI: 10.1123/jab.2025-0142

Ross E Smith, Aubrey Gray, Stephanie Gomez-Palacios, Howard Kashefsky, Kota Z Takahashi, Jason R Franz

{"title":"Form and Function: Stronger Toes and Shorter Heels Associate With Better Gait Performance.","authors":"Ross E Smith, Aubrey Gray, Stephanie Gomez-Palacios, Howard Kashefsky, Kota Z Takahashi, Jason R Franz","doi":"10.1123/jab.2025-0142","DOIUrl":"10.1123/jab.2025-0142","url":null,"abstract":"The human foot's unique structure is believed to facilitate our adoption of habitual bipedal locomotion. The foot is particularly important in enabling economical forward propulsion through plantar intrinsic force output and ankle plantar flexor force transfer. An increased capacity for economical forward propulsion would enhance walking performance, that is, faster preferred walking speed (PWS) and improved walking endurance (WE). However, the association between the foot's unique features and walking performance remains unclear. This study investigated whether neuromechanical (flexor digitorum brevis muscle activity and thickness, toe flexor strength) and anthropometric (heel and toe length) foot features associated with PWS and WE (ie, 6-min walk test distance) in younger adults. Stronger toe flexors associated with greater WE (r = .641, P = .010), whereas shorter heels (ie, calcaneus length) associated with faster PWS (r = -.527, P = .044). Stronger toe flexors enhance WE by increasing net propulsion capacity, whereas shorter heels may enable optimal muscle-tendon operating conditions. These insights highlight potential targets for rehabilitation and assistive devices designed to improve walking performance in individuals with gait impairments.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"95-101"},"PeriodicalIF":1.6,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031667","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

Adherence to Simple Spring-Mass Mechanics During Submaximal Running in Individuals With Unilateral Transfemoral Amputation. 单侧经股截肢患者在亚极限运动中坚持简单的弹簧-质量力学。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-01-12 Print Date: 2026-04-01 DOI: 10.1123/jab.2025-0076

Ying Wai Tang, Akihiko Murai, Hiroaki Hobara

{"title":"Adherence to Simple Spring-Mass Mechanics During Submaximal Running in Individuals With Unilateral Transfemoral Amputation.","authors":"Ying Wai Tang, Akihiko Murai, Hiroaki Hobara","doi":"10.1123/jab.2025-0076","DOIUrl":"10.1123/jab.2025-0076","url":null,"abstract":"Lower extremities adhering to the spring mechanics proposed by the spring-loaded inverted pendulum (SLIP) model during running are regarded as a form of running-gait optimization among runners. We examined the degree of adherence between experimental and SLIP model-predicted vertical ground reaction force (vGRF) in individuals with unilateral transfemoral amputation. Nine individuals with unilateral transfemoral amputation performed running trials at 6 different speeds on an instrument treadmill. The trials were set at 30% to 80% of their maximum speeds with a 10% increment. The experimental vGRF collected was compared with SLIP model-predicted vGRF. The degree of adherence was calculated using the R2 goodness-of-fit statistics. The experimental vGRF of the affected limbs exhibited a significantly higher degree of adherence than unaffected limbs. There were no significant differences in the degree of adherence between different speed trials for either limb. This finding indicates that running-specific prostheses exhibit mechanical behavior that is consistent with SLIP mechanics, whereas the unaffected limb relies on compensatory, non-SLIP-like strategies. Furthermore, the results suggest that the interaction of running-specific prostheses with other prosthetic components and the residual limb enables the preservation of running mechanics across a range of speeds, thereby supporting the application of SLIP-based modeling to the affected limb.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"108-114"},"PeriodicalIF":1.6,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031652","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

Clinically Relevant Gait Biomechanics Improvements After Total Knee Arthroplasty. 全膝关节置换术后临床相关步态生物力学改善。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2025-10-29 Print Date: 2025-12-01 DOI: 10.1123/jab.2024-0139

Annemarie F Laudanski, Jereme B Outerleys, Renata Kirkwood, Cheryl L Hubley-Kozey, Kathryn L Young-Shand, C Glen Richardson, Michael J Dunbar, Janie L Astephen Wilson

{"title":"Clinically Relevant Gait Biomechanics Improvements After Total Knee Arthroplasty.","authors":"Annemarie F Laudanski, Jereme B Outerleys, Renata Kirkwood, Cheryl L Hubley-Kozey, Kathryn L Young-Shand, C Glen Richardson, Michael J Dunbar, Janie L Astephen Wilson","doi":"10.1123/jab.2024-0139","DOIUrl":"10.1123/jab.2024-0139","url":null,"abstract":"Improved joint function is a primary goal of total knee arthroplasty (TKA), yet persistent postoperative deficits in joint biomechanics are common, and the link between these and other clinical outcomes is poorly understood. Evidence on clinically meaningful gait outcomes after arthroplasty is limited, hindering their uptake in clinical trials and technological innovations in arthroplasty. This paper examined the associations between gait outcomes and satisfaction after TKA and defined minimal detectable and clinically meaningful thresholds for gait outcome changes. Thirty-one patients underwent instrumented gait analysis immediately before and 1 year after TKA and were categorized as high (>90) and lower (≤90) satisfaction with their joint replacement after surgery. Sixteen (51.6%) patients self-reported high satisfaction, and 15 (48.4%) reported lower satisfaction. There were no pre-TKA gait differences between the groups, but higher satisfaction postarthroplasty was associated with more a biphasic pattern improvement of the knee flexion/extension moment during stance from presurgery to postsurgery (r = .59, P = .001). Most patients, however, did not achieve minimal detectable or meaningful clinically important improvements in knee biomechanics from pre-TKA to post-TKA. The established thresholds for meaningful improvement in biomechanical variables may be used in future studies to relate measures of patient satisfaction to objective gait outcomes.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"571-582"},"PeriodicalIF":1.6,"publicationDate":"2025-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145403087","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

Multijoint Coordination Contributes to the Minimization of Frontal Plane Center-of-Mass Displacement in Maximal Velocity Sprinting. 多关节协调有助于最大速度冲刺时锋面质心位移的最小化。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2025-10-25 Print Date: 2025-12-01 DOI: 10.1123/jab.2024-0221

Chris L Vellucci, Shawn M Beaudette

{"title":"Multijoint Coordination Contributes to the Minimization of Frontal Plane Center-of-Mass Displacement in Maximal Velocity Sprinting.","authors":"Chris L Vellucci, Shawn M Beaudette","doi":"10.1123/jab.2024-0221","DOIUrl":"10.1123/jab.2024-0221","url":null,"abstract":"Previous studies on sprinting biomechanics have identified a variety of biomechanical characteristics that describe the outcome of improved sprint technique but in doing so have neglected to identify the postural control strategies that lead to improved sprint performance. The purpose of this study was to evaluate the relationship between frontal plane displacement of the center of mass (CoM) and sprint velocity, and to understand if multijoint coordination of the limbs and trunk were associated with minimizing the displacement. The results from this study suggest that stance phase frontal plane CoM cumulative path length is significantly associated with sprint velocity. Further, a multivariate linear regression model revealed that coordinative couplings of the bilateral limbs and trunk were associated with the minimization of the frontal plane CoM displacement. Specifically, the coordination of the knees (flexion-extension) and axial rotation of the thorax-pelvis were the most important interjoint couplings in minimizing frontal plane CoM displacement. Frontal plane CoM displacement provides coaches, athletes, and performance professionals with an interpretable metric to identify sprint technique quality in field using wearable sensors. Future work needs to further advance our understanding of postural control during sprinting so that effective coaching and rehabilitation interventions can be designed.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"561-570"},"PeriodicalIF":1.6,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145372588","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 Impact of Participant Instructions on Lumbopelvic Rhythm During Forward Spine Flexion and Return. 参与者的指导对腰骨盆节奏的影响在脊柱前屈和回。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2025-10-09 Print Date: 2025-12-01 DOI: 10.1123/jab.2024-0245

Shabbir Ahmed Sany, Andrew J Wilkie, Mona Frey, Yanqing Yi, Diana De Carvalho

{"title":"The Impact of Participant Instructions on Lumbopelvic Rhythm During Forward Spine Flexion and Return.","authors":"Shabbir Ahmed Sany, Andrew J Wilkie, Mona Frey, Yanqing Yi, Diana De Carvalho","doi":"10.1123/jab.2024-0245","DOIUrl":"10.1123/jab.2024-0245","url":null,"abstract":"Spine motion and outcome measures derived therein may be confounded by the motion instructions provided to participants during data collection. This observational analytical laboratory-controlled study explored the impact of instructions for forward flexion trials on the lumbopelvic ratio (LPR) and spine kinematics. Twenty-five participants (mean age: 25.68 [9.31] y) performed forward bending trials with general instructions and then specific instructions to avoid hip motion and follow pacing. Participants were equipped with triaxial accelerometers at the lumbar spine (first lumbar vertebra) and pelvis (second sacral vertebra) to measure lumbar and pelvic excursions and LPR across the movement phases. The Wilcoxon signed-rank test was used to compare outcome variables between conditions. Lumbar excursion did not differ significantly between conditions, whereas pelvic excursion was significantly reduced in the specific instructions condition (P < .05). LPR showed considerable variability in the specific instructions condition, but there was no significant difference from the general instruction condition. Thus, instructing participants to limit hip motion appears to reduce pelvic excursion during forward bending without statistically affecting lumbar motion or the LPR. Providing and reporting clear and precise movement instructions to participants is important as they can change kinematics. Further, it appears that verbal instructions alone are unlikely to achieve complete spine movement isolation in all participants.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"552-560"},"PeriodicalIF":1.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260202","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 Cheerleading Surfaces on Ankle Landing Characteristics During Vertical and Flip Landings. 拉拉队表面对垂直和翻转着地时踝关节着地特性的影响。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2025-10-06 Print Date: 2025-12-01 DOI: 10.1123/jab.2025-0017

Anthony V Nguyen, Brooke A Slavens, Stephen C Cobb, Kristian M O'Connor

{"title":"The Effects of Cheerleading Surfaces on Ankle Landing Characteristics During Vertical and Flip Landings.","authors":"Anthony V Nguyen, Brooke A Slavens, Stephen C Cobb, Kristian M O'Connor","doi":"10.1123/jab.2025-0017","DOIUrl":"10.1123/jab.2025-0017","url":null,"abstract":"Lateral ankle sprains are common in cheerleading, especially during tumbling. Landing surfaces influence injury risk by affecting joint mechanics, but few studies compare vertical and flip landings. This study examined the effects of a hard (HARD) and matted (MAT) surfaces on vertical drop (VERT) and flip (FLIP) landing tasks. Twelve collegiate cheerleaders performed both tasks with 3-dimensional kinematics and kinetics collected. Repeated-measures analyses of variance (task × surface, P < .05) analyzed sagittal and frontal plane variables. The FLIP task exhibited 84% greater peak ground reaction forces and 148% greater loading rates, as well as greater peak ankle angles and reduced ankle plantar flexion at initial contact compared to the VERT task. Increased foot velocities at initial contact during FLIP, driven by angular velocity, likely explained these heightened characteristics. HARD surface landings resulted in greater peak loading rates, peak angles, and inversion at initial contact. The peak plantar flexor moment was greater when landing on a HARD surface after a FLIP. Flip landings may elevate injury risks compared to vertical landings while supporting that harder landing surfaces increase injury risks. The significant differences between the tasks due to angular velocity differences also caution against generalizing vertical landings to landings within acrobatic sports.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"536-543"},"PeriodicalIF":1.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145240421","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

Validity of Poststroke Gait Spatiotemporal and Joint Excursion Metrics Between Inertial Measurement Units and a Marker-Based System. 基于标记系统的惯性测量单元与脑卒中后步态时空和关节偏移度量的有效性。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2025-10-06 Print Date: 2025-12-01 DOI: 10.1123/jab.2025-0098

Heather L Knight, Ethan B Schonhaut, Camden J Jacobs, Jesse C Dean

{"title":"Validity of Poststroke Gait Spatiotemporal and Joint Excursion Metrics Between Inertial Measurement Units and a Marker-Based System.","authors":"Heather L Knight, Ethan B Schonhaut, Camden J Jacobs, Jesse C Dean","doi":"10.1123/jab.2025-0098","DOIUrl":"10.1123/jab.2025-0098","url":null,"abstract":"People with chronic stroke often walk with altered spatiotemporal parameters and joint excursions, metrics that can serve as intervention targets. Inertial measurement units (IMUs) allow such metrics to be quantified outside of a traditional motion capture laboratory. The purpose of this study was to quantify the validity of common poststroke biomechanical gait metrics between an IMU-based and a marker-based system during treadmill walking, a context that facilitates gait training interventions. For 61 people with chronic stroke, we assessed the validity of stride duration, stride length, and sagittal plane joint excursions of the bilateral hip, knee, and ankle in 2 ways: (1) Across participants, revealing whether both systems similarly characterize participants' average gait parameters; and (2) Within participants, revealing whether both systems similarly quantify stride-by-stride variance. Across participants, all joint metrics had either excellent (Lin correlation coefficient; LCC > .75) or good (LCC .60-.74) validity, suggesting that IMU-derived metrics that are often the target of treatment can be appropriately compared to existing population norms. In contrast, median validity within participants was excellent for stride duration, but only poor (LCC < .40) to fair (LCC .40-.59) for stride length and most joint excursions. Therefore, IMU-derived gait metrics quantified on a stride-by-stride basis should be interpreted cautiously.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"528-535"},"PeriodicalIF":1.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13322382/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145240364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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