Yu Y Z, Lu S M
Beijing Institute of Labour Hygiene and Occupational Diseases, China.
Ergonomics. 1990 Jul;33(7):885-90. doi: 10.1080/00140139008925296.
Ninety-three young Chinese men selected at random were involved in the load carrying experiments. They marched at 5 km h-1 carrying loads of 0, 15, 20, 25 and 31 kg for 7 h per day. At this speed the acceptable load to be carried was 20 kg. Under this load 95% of the men had heart rates below 120 bt min-1 while marching and energy metabolism was in balance. Nevertheless, 10-15% of the men were fatigued and felt tired.
随机挑选的93名中国年轻男性参与了负重实验。他们以每小时5公里的速度行进，每天负重0、15、20、25和31公斤，持续7小时。以这个速度，可接受的负重是20公斤。在这个负重下，95%的男性在行进时心率低于每分钟120次，能量代谢处于平衡状态。然而，10%至15%的男性感到疲劳和疲倦。
