全世界步行日丨你真的会走路吗？

[3]Haskell, W. L., Co Lee, I. M. (2007). Physical activity and public health: updated recommendation for s from the American College of Sports Medicine and the American Heart Association. Circulation, 116(9), 1081-1093.

[4]Booth, F. W., Co Lees, S. J. (2007). Physically active subjects should be the control group. Medicine and science in sports and exercise, 5(2), 405-408.