Conable Katharine M
Associate Professor, Chiropractic Division, Logan College of Chiropractic, St Louis, MO 63132.
J Chiropr Med. 2010 Mar;9(1):3-10. doi: 10.1016/j.jcm.2009.12.005.
The purpose of this study is to investigate the difference in results (strong/facilitated vs weak/functionally inhibited) between short (1 second) and long (3 seconds) manual muscle tests (MMTs) on the same subject and to pilot the use of thin-film force transducers for characterizing the parameters of MMT and for measuring maximum voluntary isometric contraction (MVIC).
Forty-four healthy chiropractic students were tested. A thin-film force transducer recorded force over time during MVIC of the middle deltoid and 1- and 3-second MMTs of the same subjects. The MMTs were graded as strong (able to resist the testing pressure) or weak (unable to resist testing pressure, breaking away).
Forty-two short tests were strong, and 2 were weak. Thirty-nine long tests were strong, and 5 were weak. κ (0.54) showed fair agreement for results between short and long tests. Peak force in both short and long weak tests was higher than that in strong tests when expressed as a proportion of maximum contraction. All manual tests used less force than MVICs.
This study demonstrated that a study of this nature is feasible. Longer test durations demonstrate some muscle weaknesses that are not evident on 1-second MMTs. Thin-film transducers show promise for recording MMT parameters for research purposes.
本研究旨在调查对同一受试者进行短时间（1秒）和长时间（3秒）的徒手肌力测试（MMT）在结果（强/易化与弱/功能抑制）上的差异，并初步尝试使用薄膜力传感器来表征MMT参数以及测量最大自主等长收缩（MVIC）。
对44名健康的脊椎按摩专业学生进行测试。在同一受试者的三角肌中部进行MVIC以及1秒和3秒MMT期间，用薄膜力传感器记录随时间变化的力。MMT结果分为强（能够抵抗测试压力）或弱（无法抵抗测试压力，挣脱）。
42次短时间测试结果为强，2次为弱。39次长时间测试结果为强，5次为弱。κ值（0.54）表明短时间和长时间测试结果之间具有中等一致性。当以最大收缩的比例表示时，短时间和长时间弱测试中的峰值力均高于强测试中的峰值力。所有徒手测试使用的力均小于MVIC。
本研究表明此类性质的研究是可行的。更长的测试持续时间能显示出一些在1秒MMT中不明显的肌肉无力情况。薄膜传感器在记录用于研究目的的MMT参数方面显示出前景。
