WORK CAPACITY DURING 30 DAYS OF BED REST WITH ISOTONIC AND ISOKINETIC EXERCISE TRAINING
WORK CAPACITY DURING 30 DAYS OF BED REST WITH ISOTONIC AND ISOKINETIC EXERCISE TRAINING
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DOI：
10.1152/jappl.1989.67.5.1820
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发表时间：
1989-11-01
影响因子：
3.3
通讯作者：
WADE, CE
中科院分区：
文献类型：
--
作者：
GREENLEAF, JE;BERNAUER, EM;WADE, CE
目的是检验以下假设：每天两次、短期、可变强度等张和间歇性高强度等速腿部运动将在 -6°C 的 30 天内分别保持峰值摄氧量 (.ovrhdot.VO2) 以及肌肉力量和耐力处于或接近动态控制水平。头低位卧床休息（BR）去适应。 19 名男性（年龄 32-42 岁）被分为无运动控制组（峰值 ovrhdot.VO2 一次/周，n = 5）、等速组（Lido 测力计，n = 7）和等张组（Quinton 测力计，n = 7）。运动训练以仰卧位进行，每天两次，每次 30 分钟，每周 5 天。等张训练为峰值 ovrhdot.VO2 的 60-90%，等速训练（膝关节屈曲-伸展）为 100°/s。从动态对照到 BR 第 28 天的峰值 .ovrhdot.VO2 (ml .cntdot. m-1 .cntdot. kg-1) 的平均 (.+-. SE) 变化 (* P < 0.05) 为 44 .+-。 4 至 36* .+-. 3、-18.2%* (3.27-2.60* l/m)（无运动），39 .+-。 4 至 40 .+-. 3，等渗+2.6% (3.13-3.14 l/min)，以及 44 .+-。 3 至 40* .+-. 2、-9.1%* (3.24-2.90* l/min) 等速。任何组的腿部峰值扭矩（右膝弯曲或伸展）、腿部平均总做功、手臂总峰值扭矩或手臂平均总做功都没有显着变化。等张和等速运动训练的平均能量消耗分别为 446 kcal/h (18.8 .+-. 1.6 ml .cntdot. min-1 .cntdot. kg-1) 和 214 kcal/h (8.9 .+-. 0.5 ml .cntdot. m-1 .cntdot. kg-1)。因此，近峰值、可变强度、等张腿部运动在BR的30天期间维持峰值.ovrhdot.VO2，而该峰值、间歇性、等速腿部运动方案则不能。
The purpose was to test the hypothesis that twice daily, short-term, variable intensity isotonic and intermittent high-intensity isokinetic leg exercise would maintain peak O2 uptake (.ovrhdot.VO2) and muscular strength and endurance, respectively, at or near ambulatory control levels during 30 days of -6.degree. head-down bed rest (BR) deconditioning. Nineteen men (aged 32-42 yr) were divided into no exercise control (peak .ovrhdot.VO2 once/wk, n = 5), isokinetic (Lido ergometer, n = 7), and isotonic (Quinton ergometer, n = 7) groups. Exercise training was conducted in the supine position for two 30-min periods/day for 5 days/wk. Isotonic training was at 60-90% of peak .ovrhdot.VO2, and isokinetic training (knee flexion-extension) was at 100.degree./s. Mean (.+-. SE) changes (* P < 0.05) in peak .ovrhdot.VO2 (ml .cntdot. m-1 .cntdot. kg-1) from ambulatory control to BR day 28 were 44 .+-. 4 to 36* .+-. 3, -18.2%* (3.27-2.60* l/m) for no exercise, 39 .+-. 4 to 40 .+-. 3, +2.6% (3.13-3.14 l/min) for isotonic, and 44 .+-. 3 to 40* .+-. 2, -9.1%* (3.24-2.90* l/min) for isokinetic. There were no significant changes in any groups in leg peak torque (right knee flexion or extension), leg mean total work, arm total peak torque, or arm mean total work. Mean energy costs for the isotonic and isokinetic exercise training were 446 kcal/h (18.8 .+-. 1.6 ml .cntdot. min-1 .cntdot. kg-1) and 214 kcal/h (8.9 .+-. 0.5 ml .cntdot. m-1 .cntdot. kg-1), respectively. Thus near-peak, variable intensity, isotonic leg exercise maintains peak .ovrhdot.VO2 during 30 days of BR, while this peak, intermittent, isokinetic leg exercise protocol does not.