References
- Riggs B L., Melton I LJ., II. Involutional osteoporosis. N Engl J Med 1986; 314: 1676–84
- Obrant K J., Bengner U, Johnell O, Nilsson B E., Sernbo I. Increasing age-adjusted risk of fragility fractures: a sign of increasing osteoporosis in successive generations? Editorial. Calcif Tissue Int 1989; 44: 157–67
- Lane N E., Bloch D A., Jones H H., Marshall W H., Wood P D., Fries J F. Long-distance running, bone density, and osteoarthritis. JAMA 1986; 255: 1147–51
- Krolner B, Toft B, Nielsen S P., Tondevold E. Physical exercise as prophylaxis against involutional vertebral bone loss: a controlled trial. Clin Sci 1983; 64: 541–6
- Pocock N A., Eisman J A., Yeates W IG, Sambrook P N., Eberl S. Physical fitness is a major determinant of femoral neck and lumbar spine bone mineral density. J Clin Invest 1986; 78: 618–21
- Dalsky G P., Stocke K S., Ehsani A A., Slatopolsky E, Lee W C., Birge S J. Weight-bearing exercise training and lumbar bone mineral content in postmenopausal women. Ann Intern Med 1988; 108: 824–8
- Michel B A., Bloch D A., Fries J F. Weight-bearing exercise, over exercise, and lumbar bone density over age fifty. Arch Intern Med 1989; 149: 2325–9
- Lane N E., Bloch D A., Hubert H B., Jones H H., Simpson U, Fries J F. Running, osteoarthritis, and bone density: initial 2-year longitudinal study. Am J Med 1990; 88: 452–9
- Lane N E., Bloch D A., Wood P D., Fries J F. Aging, longdistance running, and the development of musculoskeletal disability. Am J Med 1987; 82: 772–80
- Cavanaugh D J., Cann C E. Brisk walking does not stop bone loss in postmenopausal women. Bone 1988; 9: 201–4
- Cann C E., Genant H K. Precise measurement of vertebral mineral content using computed tomography. J Comput Assist Tomogr 1980; 4: 493–500
- Breiman L, Friedman J H., Olshen R A., Stone C J. Classification and regression trees. Wadsworth, Belmont, CA 1984
- Krolner B, Toft B. Vertebral bone loss: an unheeded side effect of therapeutic bed rest. Clin Sci 1983; 64: 537–40
- Wolman R L. Bone mineral density levels in elite female athletes. Ann Rheum Dis 1990; 49: 1013–6
- Wolff D J. Das Gesetz der Transformation der Knochen. Hirchwald, Berlin 1892
- Barzel U S. Estrogens in the prevention and treatment of postmenopausal osteoporosis: a review. Am J Med 1988; 85: 847–50
- Resnick N M., Greenspan S L. Senile osteoporosis reconsidered. JAMA 1989; 261: 1025–9
- Michel B A., Bloch D A., Fries J F. Physical activity and fractures after age fifty. Int Orthop 1991, (in press)
- Hui S L., Slemenda C W., Johnston C C. Baseline measurement of bone mass predicts fracture in white women. Ann I ntern Med 1989; 111: 355–61
- Drinkwater B L., Nilson K, Chesnut I CH, II, Bremner W J., Shainholtz S, Southworth M B. Bone mineral content of amenorrheic and eumenorrheic athletes. N Engl J Med 1984; 311: 277–81
- Nelson M E., Fisher E C., Catsos P D., Meredith C n., Turksoy R N., Ewans W J. Diet and bone status in amenorrheic runners. Am J Clin Nutr 1986; 43: 910–6
- Bilanin J E., Blanchard M S., Russek-Cohen E. Lower vertebral bone density in male long distance runners. Med Sci Sports Exerc 1989; 21: 66–70
- Lindberg J S., Powell M R., Hunt M M., Ducey D E., Wade C E. Increased vertebral bone mineral in response to reduced exercise in amenorrheic runners. West J Med 1987; 146: 39–42
- Dalen N, Hallberg D, Lamke B. Bone mass in obese subjects. Acta Med Scand 1975; 197: 353–5
- Bates G W., Whitworth N S. Effects of obesity on sex steroid metabolism. J Chron Dis 1982; 35: 893–6
- Kley H K., Deselaers T, Peerenboom H, Krüskemper H L. Enhanced conversion of androstenedione to estrogens in obese males. J Clin Endocrinol Metab 1980; 51: 1128–32