Ballet Healthcare, Royal Opera House, London, UK.
School of Medicine and Dentistry University of Central Lancashire, Preston, UK.
J Sports Sci. 2024 May;42(9):840-846. doi: 10.1080/02640414.2024.2368785. Epub 2024 Jun 20.
Trunk strength plays a vital role in athletic performance, rehabilitation and general health, however, current assessment methods are expensive, non-portable or unreliable. This study aimed to investigate the within- and between-session reliability, variability, standard error of measurement and minimal detectable change (MDC) of trunk strength in the sagittal (flexion and extension) and frontal planes (left and right lateral flexion) using a fixed digital dynamometer. Eighteen participants (ten men and eight women) attended two sessions separated by 7 days. Participants were fitted with a trunk harness which was secured to an immovable base via a digital dynamometer. Three maximal voluntary isometric contractions were completed across four positions (prone, supine, left-side recumbent and right-side recumbent, respectively) on a glute-hamstring raise machine. All positions demonstrated reliability and low variability within session (ICC: 0.95-0.98; CV: 5-7%) and between sessions (ICC: 0.98-0.99; CV: 4-6%), across all positions. The between-session MDC ranged from 8% (prone) to 13% (right-side recumbent), translating to absolute values between 2.9 and 3.2 kg across all positions. Maximal isometric force testing using a fixed digital dynamometer provides reliable measurements of multiplanar trunk strength, providing a practical method for use in clinical practice.
躯干力量在运动表现、康复和整体健康中起着至关重要的作用，然而，目前的评估方法昂贵、不便于携带或不可靠。本研究旨在使用固定数字测力计，研究在矢状面（屈伸）和额状面（左右侧屈）中躯干力量的内部和之间测试的可靠性、可变性、测量误差标准和最小可检测变化（MDC）。18 名参与者（10 名男性和 8 名女性）参加了两次相隔 7 天的测试。参与者佩戴躯干吊带，通过数字测力计将其固定在不可移动的底座上。在臀肌-绳肌抬高机上的四个位置（分别为俯卧、仰卧、左侧卧位和右侧卧位）完成了三次最大等长自愿收缩。所有位置在测试内（ICC：0.95-0.98；CV：5-7%）和测试间（ICC：0.98-0.99；CV：4-6%）均表现出可靠性和低可变性。在所有位置，测试间 MDC 的范围为 8%（俯卧）至 13%（右侧卧位），相当于所有位置的绝对值为 2.9 至 3.2kg。使用固定数字测力计进行最大等长力量测试可提供多平面躯干力量的可靠测量，为临床实践提供了一种实用方法。
