The Effects of Increasing Trunk Flexion During Stair Ascent on the Rate and Magnitude of Achilles Tendon Force in Asymptomatic Females.

IF 1.1 4区 医学 Q4 ENGINEERING, BIOMEDICAL
Lee T Atkins, Michael Lowrey, Sarah Reagor, Kirsten Walker, Dhalston Cage
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引用次数: 1

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.

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。
研究表明,增加躯干屈曲可以优化髌股关节负荷。然而,这种姿势的改变可能会导致过度的跟腱力(ATF)和运动时受伤的风险。本研究旨在探讨女性在上楼梯时增加躯干屈曲对ATF、踝关节生物力学和垂直地面反作用力的影响。无症状女性20例(年龄23.4[2.5]岁;高度:1.6 [0.8]m;体重:63.0 [12.2]kg)使用他们自己选择的躯干弯曲姿势爬楼梯。与自选树干条件相比,ATF峰值降低(平均差值[MD] = 0.14 N/kg;95%置信区间[CI], 0.06 ~ 0.23;Cohen d = -1.2;P = 0.003),平均ATF发育速率(MD = 0.25 N/kg/s;95% CI, 0.07 ~ 0.43;Cohen d = -0.9;P = 0.010),足底屈曲力矩(MD = 0.08 N·m/kg;95% CI, 0.03 ~ 0.13;Cohen d = -1.1;P = .005),垂直地面反作用力(MD = 38.6 N/kg;95% CI, 20.3 ~ 56.90;Cohen d = -1.8;P < 0.001)。增加躯干屈曲不增加ATF。相反,这种姿势变化与ATF率和大小的降低有关,可能对跟腱病变患者有益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Applied Biomechanics
Journal of Applied Biomechanics 医学-工程:生物医学
CiteScore
2.00
自引率
0.00%
发文量
47
审稿时长
6-12 weeks
期刊介绍: The mission of the Journal of Applied Biomechanics (JAB) is to disseminate the highest quality peer-reviewed studies that utilize biomechanical strategies to advance the study of human movement. Areas of interest include clinical biomechanics, gait and posture mechanics, musculoskeletal and neuromuscular biomechanics, sport mechanics, and biomechanical modeling. Studies of sport performance that explicitly generalize to broader activities, contribute substantially to fundamental understanding of human motion, or are in a sport that enjoys wide participation, are welcome. Also within the scope of JAB are studies using biomechanical strategies to investigate the structure, control, function, and state (health and disease) of animals.
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