Gilda Marx flexes her muscles; she says she invented aerobics, and, considering what she's done with her Los Angeles-based exercise-wear business, there's no reason to think that she didn't. (company profile)

Gilda Marx flexes her muscles

She says she invented aerobics, and, considering what she's done with her Los Angeles-based exercise-wear business, there's no reason to think that she didn't

In 1977, with her place in exercise history secure, Gilda Marx wanted to lead new movements. She didn't have to look far.

Women across the United States were doing a strange new exercise, a hybrid of dance and calisthenics, that Marx said she discovered when Jane Fonda was still in hot pants. But they had nothing to wear. The aerobics fashion niche was aching to be filled…