Benefits of 2 years of intense exercise on bone density, physical fitness, and blood lipids in early postmenopausal osteopenic women: results of the Erlangen Fitness Osteoporosis Prevention Study (EFOPS) - Kemmler,W.; Lauber,D.; Weineck,J.; Hensen,J.; Kalender,W.; Engelke,K. (Arch Intern Med, 2004)