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

Carrie Underwood's latest priority is longevity.

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• Singer-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 decades and dialing in her longevity routine.