My grandpa had a quadruple-bypass 25 years ago. Now 90, he credits his longevity to daily bodyweight workouts with my grandma, 87.

My grandpa, 90, credits his longevity to daily walks and bodyweight workouts with my grandma, 87. He's also his cardiologist's "poster child."

My grandpa, 90, credits his longevity to daily walks and bodyweight workouts with my grandma, 87. He's also his cardiologist's "poster child."

My grandpa, 90, credits his longevity to daily walks and bodyweight workouts with my grandma, 87. He's also his cardiologist's "poster child."