Bernauer E M, Walby W F, Ertl A C, Dempster P T, Bond M, Greenleaf J E
Laboratory for Human Environmental Physiology, NASA, Ames Research Center, Moffett Field, CA 94035-1000.
Aviat Space Environ Med. 1994 Dec;65(12):1110-5.
To determine if daily isotonic exercise or isokinetic exercise training coupled with daily leg proprioceptive training, would influence leg proprioceptive tracking responses during bed rest (BR), 19 men (36 +/- SD 4 years, 178 +/- 7 cm, 76.8 +/- 7.8 kg) were allocated into a no-exercise (NOE) training control group (n = 5), and isotonic exercise (ITE, n = 7) and isokinetic exercise (IKE, n = 7) training groups. Exercise training was conducted during BR for two 30-min periods.d-1, 5 d.week-1. Only the IKE group performed proprioceptive training using a new isokinetic procedure with each lower extremity for 2.5 min before and after the daily exercise training sessions; proprioceptive testing occurred weekly for all groups. There were no significant differences in proprioceptive tracking scores, expressed as a percentage of the perfect score of 100, in the pre-BR ambulatory control period between the three groups. Knee extension and flexion tracking responses were unchanged with NOE during BR, but were significantly greater (p < 0.05) at the end of BR in both exercise groups when compared with NOE responses (extension: NOE 80.7 +/- 0.7%, ITE 82.9 +/- 0.6%, IKE 86.5* +/- 0.7%; flexion: NOE 77.6 +/- 1.5%, ITE 80.0 +/- 0.8% (NS), IKE 83.6* +/- 0.8%). Although proprioceptive tracking was unchanged during BR with NOE, both isotonic exercise training (without additional proprioceptive training) and especially isokinetic exercise training when combined with daily proprioceptive training, significantly improved knee proprioceptive tracking responses after 30 d of BR.
为了确定每日等张运动或等速运动训练结合每日腿部本体感觉训练是否会影响卧床休息（BR）期间的腿部本体感觉跟踪反应，将19名男性（年龄36±标准差4岁，身高178±7厘米，体重76.8±7.8千克）分为无运动（NOE）训练对照组（n = 5）、等张运动（ITE，n = 7）训练组和等速运动（IKE，n = 7）训练组。运动训练在BR期间进行，每天两个30分钟时段，每周5天。只有IKE组在每日运动训练前后使用新的等速程序对每个下肢进行2.5分钟的本体感觉训练；所有组每周进行本体感觉测试。在BR前的门诊对照期，三组之间以满分100分的百分比表示的本体感觉跟踪分数没有显著差异。在BR期间，NOE组的膝关节伸展和屈曲跟踪反应没有变化，但与NOE组反应相比，两个运动组在BR结束时显著更高（p < 0.05）（伸展：NOE 80.7±0.7%，ITE 82.9±0.6%，IKE 86.5*±0.7%；屈曲：NOE 77.6±1.5%，ITE 80.0±0.8%（无显著性差异），IKE 83.6*±0.8%）。尽管在BR期间NOE组的本体感觉跟踪没有变化，但等张运动训练（无额外本体感觉训练），尤其是等速运动训练与每日本体感觉训练相结合，在BR 30天后显著改善了膝关节本体感觉跟踪反应。
