Miriam Nelson

OCCUPATION Research scientist and author of the Strong Women series

GOAL To persuade women of all ages of the health benefits of weight training

QUOTE "I love it when a 75-year-old woman shows me her biceps."

In 1994 Miriam Nelson and Tufts University colleagues proved that lifting weights doesn't just build muscles. It also strengthens brittle bones and reduces osteoporosis risk in older women. Ever since, she's been crusading to reacquaint women with their biceps, triceps and hamstrings. "We value our skin, breasts and hair," Nelson says. "But we don't value our muscles as much as we should."

Though...

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