A meta-analysis 1 examined the effect of exercise on bone mass in pre- and postmenopausal women. Thirty-five randomised controlled studies qualified for analysis. The evaluation differentiated between impact-containing exercise (such as aerobics) and one that did not contain impacts (such as resistance training). Exercise with both with and without impact may reduce the loss of minerals from the lumbar vertebrae in pre- and postmenopausal women. Impact-containing exercise appears to prevent the loss of mineral in the femoral bone neck.
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