For a long time, men have dominated the sport of weight lifting. But tucked away at a YMCA in the small Midwestern town of Canton, Ohio, some 150 women are pumping iron, straining and twisting their feminine physiques, trying to smooth those flabby curves.

They bench-press, lift barbells, dumbbells, do chin-ups, situps, leg extensions and numerous other body exercises until their bodies ache with pain.

And all for what?

For some it’s just to stay in shape, but for about 20 others it’s a competitive sport and a rapidly developing one at that.