Legg S J, Ramsey T, Knowles D J
Army Personnel Research Establishment, Farnborough, UK.
Ergonomics. 1992 Sep;35(9):1063-8. doi: 10.1080/00140139208967382.
Eleven healthy male volunteer soldiers (mean [SD] age 24.0 [2.8] years, stature 174.1 [5.2] cm, body weight 73.2 [10.8] kg, body fat 14.2 [5.0]% and maximal oxygen uptake 4.1 [0.4] 1 min-1) walked at 4.8 km h-1 on a motor driven treadmill for 5 min at each of three gradients (0, 2.5 and 5%) whilst carrying a two-part 26 kg load either on each shoulder or strapped to a backpack frame. The load was made up of two cylinders, one weighing 18.4 kg and the other weighing 7.6 kg. For all treadmill gradients the mean (SD) backpacking heart rates and oxygen uptakes (0% gradient, 122 [10] beats min-1, 1.51 [0.11] 1 min-1; 2.5% gradient, 135 [10] beats min-1, 1.81 [0.13] 1 min-1; 5% gradient, 155 [7] beats min-1, 2.21 [0.11] 1 min-1) were significantly (p less than 0.001) lower than for shoulder load carriage (0% gradient, 130 [9] beats min-1, 1.70 [0.12] 1 min-1, 2.5% gradient, 147 [8] beats min-1; 2.01 [0.10] 1 min-1; 5% gradient 164 [9] beats min-1, 2.39 [0.11] 1 min-1). The relative oxygen cost of backpacking was 4.3-4.7% VO2 max lower than for shoulder load carriage. It is concluded that the metabolic cost of backpacking an asymmetric two part 26 kg load was significantly less than for shoulder load carriage when walking at 4.8 km h-1 on a treadmill over gradients of 0-5%.(ABSTRACT TRUNCATED AT 250 WORDS)
11名健康男性志愿士兵（平均[标准差]年龄24.0[2.8]岁，身高174.1[5.2]厘米，体重73.2[10.8]千克，体脂14.2[5.0]%，最大摄氧量4.1[0.4]升/分钟）在电动跑步机上以4.8千米/小时的速度行走，在三个坡度（0%、2.5%和5%）下各走5分钟，同时在每个肩膀上背负一个由两部分组成的26千克重物，或者将其绑在背包框架上。重物由两个圆柱体组成，一个重18.4千克，另一个重7.6千克。对于所有跑步机坡度，平均（标准差）背包负重时的心率和摄氧量（0%坡度：122[10]次/分钟，1.51[0.11]升/分钟；2.5%坡度：135[10]次/分钟，1.81[0.13]升/分钟；5%坡度：155[7]次/分钟，2.21[0.11]升/分钟）显著（p<0.001）低于肩膀负重时（0%坡度：130[9]次/分钟，1.70[0.12]升/分钟；2.5%坡度：147[8]次/分钟，2.01[0.10]升/分钟；5%坡度：164[9]次/分钟，2.39[0.11]升/分钟）。背包负重时的相对氧耗比肩膀负重时低4.3 - 4.7%的最大摄氧量。得出结论，在跑步机上以4.8千米/小时的速度在0 - 5%的坡度上行走时，背负一个不对称的两部分26千克重物的代谢成本显著低于肩膀负重。（摘要截取自250字）
