People With Low Back Pain Exhibit Higher Trunk Muscle Activity and Impaired Postural Control During Static and Dynamic Functional Tasks: A Cross-Sectional Study
J Appl Biomech. 2023 Oct 12:1-8. doi: 10.1123/jab.2023-0033. Online ahead of print.ABSTRACTThe study compared superficial trunk muscle activity and postural control among an active extension subgroup of people with nonspecific chronic low back pain (AE-NSCLBP) with painfree controls during functional tasks. Thirty-two people (17 people with low back pain [LBP] and 15 painfree controls) participated in this study. Muscle activity of 5 trunk muscles and postural control were investigated during both standing tasks (eyes open/closed; single/double-leg balance) and dynamic functional tasks (spinal forward flexion and return, a...
Source: Journal of Applied Biomechanics - November 2, 2023 Category: Sports Medicine Authors: Sara Salamat Saeed Talebian Nader Maroufi Gitta Kalbassi Davood Salamat Kieran O'Sullivan Source Type: research
Do Sex and Age Influence Scapular and Thoracohumeral Kinematics During a Functional Task Protocol?
J Appl Biomech. 2023 Oct 11:1-11. doi: 10.1123/jab.2023-0085. Online ahead of print.ABSTRACTThere is mixed evidence on the role that biological sex plays in shoulder biomechanics despite known differences in musculoskeletal disorder prevalence between males and females. Additionally, advancing age may contribute to shoulder kinematic changes. The purpose of this study was to determine if sex and age influenced scapular and thoracohumeral kinematics during a range of functional tasks. Sixty healthy participants aged 19-63 years (30 males; 30 females) completed a functional task protocol while their upper limb motion was rec...
Source: Journal of Applied Biomechanics - November 2, 2023 Category: Sports Medicine Authors: Alexander Waslen Kenzie B Friesen Angelica E Lang Source Type: research
Increasing Breast Support is Associated With a Distal-to-Proximal Redistribution of Joint Negative Work During a Double-Limb Landing Task
This study investigates the effect of breast support on joint negative work and joint contributions to total negative work during landing. Thirty-five female athletes performed 5 landing trials in 3 breast support conditions. Lower-extremity joint negative work and relative joint contributions to total negative work were calculated. Univariate analyses of variance were used to determine the effect of breast support on negative joint work values. Increasing levels of breast support were associated with lower ankle negative work (P < .001) and ankle relative contributions (P < .001) and increases in hip negative work (...
Source: Journal of Applied Biomechanics - November 2, 2023 Category: Sports Medicine Authors: Hailey B Fong Alexis K Nelson Deirdre McGhee Kevin R Ford Douglas W Powell Source Type: research
People With Low Back Pain Exhibit Higher Trunk Muscle Activity and Impaired Postural Control During Static and Dynamic Functional Tasks: A Cross-Sectional Study
J Appl Biomech. 2023 Oct 12:1-8. doi: 10.1123/jab.2023-0033. Online ahead of print.ABSTRACTThe study compared superficial trunk muscle activity and postural control among an active extension subgroup of people with nonspecific chronic low back pain (AE-NSCLBP) with painfree controls during functional tasks. Thirty-two people (17 people with low back pain [LBP] and 15 painfree controls) participated in this study. Muscle activity of 5 trunk muscles and postural control were investigated during both standing tasks (eyes open/closed; single/double-leg balance) and dynamic functional tasks (spinal forward flexion and return, a...
Source: Journal of Applied Biomechanics - November 2, 2023 Category: Sports Medicine Authors: Sara Salamat Saeed Talebian Nader Maroufi Gitta Kalbassi Davood Salamat Kieran O'Sullivan Source Type: research
Do Sex and Age Influence Scapular and Thoracohumeral Kinematics During a Functional Task Protocol?
J Appl Biomech. 2023 Oct 11:1-11. doi: 10.1123/jab.2023-0085. Online ahead of print.ABSTRACTThere is mixed evidence on the role that biological sex plays in shoulder biomechanics despite known differences in musculoskeletal disorder prevalence between males and females. Additionally, advancing age may contribute to shoulder kinematic changes. The purpose of this study was to determine if sex and age influenced scapular and thoracohumeral kinematics during a range of functional tasks. Sixty healthy participants aged 19-63 years (30 males; 30 females) completed a functional task protocol while their upper limb motion was rec...
Source: Journal of Applied Biomechanics - November 2, 2023 Category: Sports Medicine Authors: Alexander Waslen Kenzie B Friesen Angelica E Lang Source Type: research
Commingling Effects of Anterior Load and Walking Surface on Dynamic Gait Stability in Young Adults
J Appl Biomech. 2023 Oct 27:1-7. doi: 10.1123/jab.2023-0041. Online ahead of print.ABSTRACTTreadmill walking has been used as a surrogate for overground walking to examine how load carriage affects gait. The validity of using treadmill walking to investigate load carriage's effects on stability has not been established. Thirty young adults were randomized into 3 front-loaded groups (group 1: 0%, 2: 10%, or 3: 20% of bodyweight). Participants carried their load during overground and treadmill walking. Dynamic gait stability (primary outcome) was determined for 2 gait events (touchdown and liftoff). Secondary variables inclu...
Source: Journal of Applied Biomechanics - October 27, 2023 Category: Sports Medicine Authors: Caroline Simpkins Jiyun Ahn Rebekah Buehler Rebecca Ban Meredith Wells Feng Yang Source Type: research
Delivering Load-Modifying Gait Retraining Interventions via Telehealth in People With Medial Knee Osteoarthritis: A Pilot Randomized Placebo-Controlled Clinical Trial
J Appl Biomech. 2023 Oct 25:1-16. doi: 10.1123/jab.2023-0089. Online ahead of print.ABSTRACTWe aimed to investigate the effects of delivering 3 gait retraining interventions (toe-in, toe-out, and placebo gait) on proxy measures of medial knee load (early- and late-stance peak knee adduction moment [KAM], KAM impulse, and varus thrust) in people with knee osteoarthritis, using a hybrid model of face-to-face and telehealth-delivered sessions over 5 months. This was an originally planned 3-arm randomized placebo-controlled clinical trial. However, during the 2021 COVID-19 outbreak and lockdown in Sydney, Australia, the study ...
Source: Journal of Applied Biomechanics - October 25, 2023 Category: Sports Medicine Authors: Nicole D'Souza Laura Hutchison Jane Grayson Claire Hiller Sarah Kobayashi Milena Simic Source Type: research
A New Way to Restrict Free Leg Movement During Unilateral Vertical Jump Test
J Appl Biomech. 2023 Oct 24:1-8. doi: 10.1123/jab.2022-0296. Online ahead of print.ABSTRACTThe purpose of this investigation was (1) to test the effect of movement restriction of the free leg during unilateral vertical jump on performance and power output comparing 2 different jump techniques: flexed (Classic technique) and straight (FC Luzern technique) free leg, and (2) to test the correlation between performance and power output obtained using these 2 techniques. Twenty elite soccer players performed squat (SJ) and countermovement (CMJ) jumps on each leg. The jump height and peak power output were compared between the 2...
Source: Journal of Applied Biomechanics - October 24, 2023 Category: Sports Medicine Authors: Christian Schmidt Mike Perroulaz Yago Perez J érémie Rosset Gabriel W üthrich Davide Malatesta Pierre Samozino Source Type: research
Quantitative Muscle Fascicle Tractography Using Brightness-Mode Ultrasound
J Appl Biomech. 2023 Oct 4:1-11. doi: 10.1123/jab.2022-0270. Online ahead of print.ABSTRACTA muscle's architecture, defined as the geometric arrangement of its fibers with respect to its mechanical line of action, impacts its abilities to produce force and shorten or lengthen under load. Ultrasound and other noninvasive imaging methods have contributed significantly to our understanding of these structure-function relationships. The goal of this work was to develop a MATLAB toolbox for tracking and mathematically representing muscle architecture at the fascicle scale, based on brightness-mode ultrasound imaging data. The M...
Source: Journal of Applied Biomechanics - October 4, 2023 Category: Sports Medicine Authors: Hannah Kilpatrick Emily Bush Carly Lockard Xingyu Zhou Crystal Coolbaugh Bruce Damon Source Type: research
