Department of Mechanical Engineering, Centro Universitário da FEI, Av. Humberto de A. C. Branco, 3972, São Bernardo do Campo, SP 01525-000, Brazil.
J Biomech. 2012 Apr 30;45(7):1293-8. doi: 10.1016/j.jbiomech.2012.01.029. Epub 2012 Feb 24.
The investigation of gait strategies at low gravity environments gained momentum recently as manned missions to the Moon and to Mars are reconsidered. Although reports by astronauts of the Apollo missions indicate alternative gait strategies might be favored on the Moon, computational simulations and experimental investigations have been almost exclusively limited to the study of either walking or running, the locomotion modes preferred under Earth's gravity. In order to investigate the gait strategies likely to be favored at low gravity a series of predictive, computational simulations of gait are performed using a physiological model of the musculoskeletal system, without assuming any particular type of gait. A computationally efficient optimization strategy is utilized allowing for multiple simulations. The results reveal skipping as more efficient and less fatiguing than walking or running and suggest the existence of a walk-skip rather than a walk-run transition at low gravity. The results are expected to serve as a background to the design of experimental investigations of gait under simulated low gravity.
最近，随着载人登月和火星任务的重新考虑，对低重力环境下步态策略的研究得到了加强。尽管阿波罗任务的宇航员报告表明，在月球上可能会青睐替代的步态策略，但计算模拟和实验研究几乎完全局限于对步行或跑步的研究，这是在地球重力下首选的运动模式。为了研究在低重力下可能倾向于采用的步态策略，使用肌肉骨骼系统的生理模型对步态进行了一系列预测性的计算模拟，而不假定任何特定类型的步态。利用一种计算效率高的优化策略，可以进行多次模拟。结果表明，跳跃比步行或跑步更有效率，也更不容易疲劳，并表明在低重力下存在走-跳而不是走-跑的转变。这些结果有望为在模拟低重力下进行步态实验研究的设计提供背景。
