A new, large-scale study says that vigorous physical activity such as playing tennis can cut the risk of breast cancer by almost 25%. “If we could get all adolescent and early adult women to be active with vigorous activity half an hour a day, we could prevent a quarter of all breast cancers before menopause”. Washington University School of Medicine and Harvard University prospective study of almost 65,000 women is the largest and most compelling to link physical activity with lowered risk in younger women…read article…