2) Haskell WL, Lee IM, Pate RR, Powell KE, Blair SN, Franklin BA, Macera CA, Heath GW, Thompson PD, Bauman A (2007) Physical activity and public health: Updated recommendation for adults from the American College of Sports Medicine and the American Heart Association. Med Sci Sports Exerc, 39(8):1423-34.
3) Hatano Y (1993) Use of the pedometer for promoting daily walking exercise. International Council for Health, Physical Education and recreation, 29:4-8.