Davies S E H, Mackinnon S N
Department of Sports Management, Cape Peninsula University of Technology, Mowbray Campus, 7700, Cape Town, Republic of South Africa.
Ergonomics. 2006 Jun 10;49(7):651-60. doi: 10.1080/00140130600558023.
This study investigated the energetics of walking on sand and grass. Fourteen adult males, participated in the study. Participants had a mean age of 34.6 years old, 72.6 kg in mass and 172.5 cm in stature, who walked at 3, 4, 5, 6 and 7 km per h on sand and grass surfaces. Physiological measures included heart rate, O(2) uptake, CO(2) exhalation, ventilation and relative O(2) uptake using a MetaMax Ergospirometer. Speed was controlled in a methodology similar to the 'Multistage 20-m Shuttle Run Test'. Data were collected during physiological steady rate at each determined speed. A minimum of 2 h rest was enforced between randomized conditions. Results indicate that there was a significant increase (p < 0.01) in all measured physiological indices indicative of energy expenditure when walking on sand compared to grass at 3-7 km per h, with the greatest disparity between the surfaces (ratio = 1.63) in relative O(2) consumption at 5 km per h.
本研究调查了在沙地和草地上行走的能量消耗情况。14名成年男性参与了该研究。参与者的平均年龄为34.6岁，体重72.6千克，身高172.5厘米，他们在沙地和草地表面以每小时3、4、5、6和7公里的速度行走。生理测量指标包括心率、氧气摄取量、二氧化碳呼出量、通气量以及使用MetaMax气体代谢分析仪测得的相对氧气摄取量。速度控制采用类似于“20米多级往返跑测试”的方法。在每个确定的速度下，于生理稳定速率期间收集数据。随机条件之间强制至少休息2小时。结果表明，与在草地上行走相比，在沙地以每小时3至7公里的速度行走时，所有表明能量消耗的测量生理指标均有显著增加（p < 0.01），在每小时5公里时，两种表面之间相对氧气消耗量的差异最大（比率 = 1.63）。
