The influence of exercise/rest schedule on the physiological and psychophysical response to isometric shoulder-neck exercise
The influence of exercise/rest schedule on the physiological and psychophysical response to isometric shoulder-neck exercise
复制标题
运动/休息时间表对等长肩颈运动的生理和心理反应的影响
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
S. Mathiassen
中科院分区：
文献类型：
--
作者：
S. Mathiassen
摘要6名女性受试者，年龄24-34岁，双臂与矢状面呈60°水平伸展，进行1小时或至精疲力竭的肩颈运动。应用了一个连续和六个间歇方案，所有方案的平均负荷与手臂的扭矩相对应，即约15%的最大自愿收缩（MVC）。间歇方案根据循环时间（10 s、60 s、360 s）和占空比（0.33、0.50、0.67、0.83）而变化。肌电图（EMG），平均动脉血压(
AbstractSix female subjects, aged 24-34 years, performed shoulder-neck exercise for 1 h or until they were exhausted by holding out their arms horizontally at 60° to the sagittal plane. One continuous and six intermittent protocols were applied, all with a mean load corresponding to the torque of the arms, i.e. about 15% maximal voluntary contraction (MVC). The intermittent protocols varied according to cycle time (10 s, 60 s, 360 s) and duty cycle (0.33, 0.50, 0.67, 0.83). Electromyogram (EMG), mean arterial blood pressure (
$$overline {BP}$$
a), heart rate (fc) and perceived fatigue were monitored at regular intervals during exercise. Blood concentrations of potassium, lactate and ammonia were determined in pre- and postexercise samples of venous blood. Before and up to 4 h after exercise, measurements were made of MVC, pressure pain threshold, proprioceptive performance, and of EMG,
$$overline {BP}$$
a and fc during 1-min arm-holding at 25% MVC. Endurance times ranged from about 10 min to more than 1 h, significantly relating to both cycle time and duty cycle. The
$$overline {BP}$$
a, fc EMG amplitude and perceived fatigue increased early during all protocols and continued to increase throughout the exercise period. Duty cycle influenced all of these variables, while only
$$overline {BP}$$
a and fatigue perception were related to cycle time. Cardiovascular and neuromuscular recovery was incomplete for hours after several of the protocols, as indicated for example by a sensitizised response to the 1-min armholding. The protocols differed substantially as regards the relationship between different responses. Thus, ranking of the protocols in terms of physiological strain was different, depending on the criterion variable. The result stresses the relevance of applying a comprehensive selection of variables when evaluating the responses to intermittent shoulder-neck exercise.
影响因子：
3.3
作者：
BIGLANDRITCHIE, B;FURBUSH, F;WOODS, JJ
通讯作者：
WOODS, JJ