Lawson Daniel J, Olmos Alex A, Stahl Cody A, Dos Santos Marcel Lopes, Goodin Jacob R, Dawes J Jay
Department of Kinesiology, Applied Health and Recreation, Oklahoma State University, Stillwater, OK, USA.
Warrior Research Center, Auburn University, Auburn, AL, USA.
Int J Exerc Sci. 2024 Nov 1;17(4):1250-1279. doi: 10.70252/NVPI2815. eCollection 2024.
The aim of this study was to determine the validity, reliability, and sensitivity of a new linear position transducer (LPT) device (RepOne) to a previously validated LPT (Tendo) during the barbell back squat and bench press exercises. Fourteen recreationally resistancetrained individuals (7 males and 7 females) performed three repetitions for the back squat and bench press at loads ranging from 30-90% 1RM. Both devices recorded average (ACV) and peak (PCV) concentric velocities concurrently for every repetition at each load. Significant correlations were observed between RepOne and Tendo during the back squat (PCV: = 0.90-0.99, < 0.01; ACV: = 0.84-0.99, < 0.01), bench press (PCV: = 0.74-0.99, < 0.01; ACV = 0.81-0.99, < 0.01). ICCs reveal good to excellent reliability between devices for back squat (PCV, 0.85-0.99; ACV, 0.83-0.99) and bench press (PCV, 0.79-0.99; ACV, 0.83-0.99). Bland-Altman plots revealed greater bias during PCV for both exercises across intensities (back squat, 0.072 to 0.110 m/s; bench press, 0.039 to 0.107 m/s), although ACV bias was lower for both exercises (back squat, -0.002 to -0.029 m/s; bench press, -0.022 to 0.015 m/s). The RepOne device generally exhibited higher smallest detectable change (SDC) values compared to the Tendo, except for specific loads in certain conditions. Additionally, the RepOne device demonstrated higher smallest worthwhile change (SWC) values than the Tendo unit for most loads in back squat ACV. Collectively, the RepOne exhibits strong validity and reliability comparable to the Tendo across both barbell back squat and bench press exercises, despite some variations in sensitivity metrics like SDC and SWC, indicating its efficacy for resistance training application.
本研究的目的是确定一种新型线性位置传感器（LPT）设备（RepOne）在杠铃后深蹲和卧推练习中相对于先前已验证的LPT（Tendo）的有效性、可靠性和敏感性。14名接受过休闲抗阻训练的个体（7名男性和7名女性）在30%-90% 1RM的负荷下进行了三次后深蹲和卧推重复动作。两种设备在每个负荷下的每次重复动作中同时记录平均（ACV）和峰值（PCV）向心速度。在后深蹲过程中，RepOne和Tendo之间观察到显著相关性（PCV： = 0.90 - 0.99， < 0.01；ACV： = 0.84 - 0.99， < 0.01），卧推过程中也有显著相关性（PCV： = 0.74 - 0.99， < 0.01；ACV = 0.81 - 0.99， < 0.01）。组内相关系数（ICCs）显示，在后深蹲（PCV，0.85 - 0.99；ACV，0.83 - 0.99）和卧推（PCV，0.79 - 0.99；ACV，0.83 - 0.99）中，两种设备之间具有良好到优秀的可靠性。Bland-Altman图显示，在两种练习的不同强度下，PCV的偏差更大（后深蹲，0.072至0.110 m/s；卧推，0.039至0.107 m/s），尽管两种练习的ACV偏差较小（后深蹲，-0.002至-0.029 m/s；卧推，-0.022至0.015 m/s）。除了某些特定条件下的特定负荷外，RepOne设备通常比Tendo显示出更高的最小可检测变化（SDC）值。此外，在大多数后深蹲ACV负荷下，RepOne设备显示出比Tendo更高的最小有价值变化（SWC）值。总体而言，尽管在SDC和SWC等敏感性指标上存在一些差异，但RepOne在杠铃后深蹲和卧推练习中均表现出与Tendo相当的强大有效性和可靠性，表明其在抗阻训练应用中的有效性。
