Differences of Fatigability in Human Skeletal Muscles

人体骨骼肌疲劳性的差异

• 批准号: 60540534
• 负责人: SATO Haruhiko
• 金额: $ 1.66万
• 依托单位: Kyushu Institute of Design
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60540534/
• 关键词: Fatigability; Static Contraction; Endurance Time; 骨格筋

The relationship between force level of isometric contraction and time until three indices of muscular fatigue was studied for the shoulder abductors, elbow flexors, elbow extensors, knee flexors, knee extensors, plantar flexors and dorsiflexors in 5-7 males. Endurance tasks were performed at the contraction levels of 5, 10, 15, 20, 30, 40 and 50% of the maximal voluntary contraction (MVC). The relative force (F %MVC) versus the endurance time or the time of tiredness("darui") and pain("itai") appearance (T min) curves were fitted to the following equation; logT=a+blog(F-k), 0<=k<=30. In the endurance time the constants k, a and b in the most fitted equation were 3, 2.02 and -1.22 for the shoulder adbuctors, 0, 4.33 and -2.52 for the elbow flexors, 2, 3.05 and -1.81 for the elbow extensors, 0, 3.05 and -1.63 for the knee flexors, 8, 1.96 and -1.23 for the knee extensors, 0, 4.53 and -2.47 for the plantar flexors, and 0, 4.51 and -2.48 for the dorsiflexors, respectively. In the time of pain appearance these values were 2, 1.64 and -1.09 for the shoulder abductors, 0, 3.33 and -1.99 for the elbow flexors, 2, 2.25 and -1.43 for the elbow extensors, 0, 2.94 and -1.78 for the knee flexors, 8, 1.35 and -0.96 for the knee extensors, 0, 3.88 and -2.16 for the plantar flexors, and 0, 3.90 and -2.24 for the dorsiflexors, respectively. In the examined muscle groups, the shoulder abductors were the most fatigable. The least fatigable were the plantar flexors and dorsiflexors, followed by the elbow flexors. The knee extensors were fatigable at higher contraction levels, and relatively fatigueless at very low contraction levels. The knee flexors, which were relatively fatigueless at higher contraction levels, became fatigable at lower contraction levels, and showed similar fatigability as the elbow extensors.

在5-7名男性中，研究了等距收缩力水平与时间之间的关系，直到肩部外展屈肌，肘部屈伸物，肘部伸肌，膝盖伸肌，膝关节伸肌，膝盖伸肌，膝关节伸肌，膝关节伸肌，膝关节伸肌，膝关节伸肌，膝盖屈伸器和背屈者。耐力任务是在最大自愿收缩（MVC）的5、10、15、20、30、40和50％的收缩水平上执行的。相对力（F％MVC）与耐力时间或疲劳时间（“ darui”）和疼痛（“ itai”）外观（t min）曲线适合以下等式； logt = a+blog（f-k），0 <= k <= 30。在耐力时间内，常数k，a和b在最适合的方程式中为肩a脚的3、2.02和-1.22，肘部屈曲物的0、4.33和-2.52，肘部伸缩器的2、3.05和-1.81，0、3.05和-1.63均适用于0、3.05和-1.63。足底屈肌的4.53和-2.47，背屈分别为0、4.51和-2.48。在疼痛外观的时候，肩部外展子的这些值为2、1.64和-1.09，肘部屈肌为0、3.33和-1.99，肘伸肌为2、2.25和-1.43，膝盖屈肌为0、2.94和-1.78，用于8、1.35和-0.96的工厂和-0.96 forsors和-0.96 forsors，0.96 forsors，0.96 foresors，0.9.96 forsors，0.9.3888888888888888888888888。屈肌分别为背反射器的0、3.90和-2.24。在检查的肌肉群中，肩部绑架者是最疲劳的。最少疲劳的是足底屈肌和背屈，然后是肘部屈肌。膝关节伸肌在收缩水平较高，在收缩水平下相对疲劳。在收缩水平较低的收缩水平上，膝盖屈肌在较低的收缩水平上变得疲劳，并且表现出与肘部伸肌相似的疲劳性。