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 SARATOGA SPRINGS, N.Y. (AP) - America might not need yet another exercise machine. Treadmills, weights and resistance equipment already jam the health clubs. Yet Gravity machines have found a niche at the YMCA in this resort town.
On a recent weekday morning, a dozen women and men push, pull and grunt on the machines' slanted glideboards. They push with their legs, then pull with their arms — up and down diagonally.
"Keep those legs up!" trainer Yonka Perkins tells her straining students. "Keep those glutes nice and tight!"
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