Carrie Underwood's longevity routine includes eating more protein, gardening, and hundreds of push-ups

Carrie Underwood's longevity routine includes eating more protein, gardening, and hundreds of push-ups

Carrie Underwood's latest priority is longevity.Joy Malone/Getty ImagesSinger-songwriter Carrie Underwood prioritizes longevity with her routine.She said her habits include working in her garden, a form of exercise that supports healthy aging.She also swears by doing push-ups in every workout and getting more protein to build muscle.When Carrie Underwood grows up, she wants to be a fit grandma.Now in her 40s, she's looking ahead to the coming de…