4Piya-Anant M, Therasakvichya S, Leelaphatanadit C, et al. Integrated health research program for the Thai elderly: prevalence of genital prolapse and effectiveness of pelvic floor exercise to prevent worsening of genital prolapse in elderly women[J]. J Med Assoc Thai, 2003,86 (6) :509-515.
5Lynch J, Helmrich S P, Lakka T A, et al. Moderately intense physical activities and high levels of cardiorespiratory fitness reduce the risk of non-insulin-dependent diabetes mellitus in middle-aged men [J]. Arch Intern Med, 1996,156(12) : 1307-1314.
6Tuomilehto J, Lindstrom J, Eriksson J G, et al. Prevention of type 2 diabetes mellitus by changes in lifestyle among subjects with impaired glucose tole-rance[J]. N Engl J Med,2001,344(18):1343-1350.
7Knowler W C, Barrett-Connor E, Fowler S E, et al. Reduction in the incidence of type 2 diabetes with life- style intervention or metformin[J]. N Engl J Med, 2002, 346(6) : 393-403.