The 30-Day Push-Up Challenge to Strengthen Your Upper Body and Core

This 30-day push-up challenge will strengthen your entire upper body and core thanks to a variety of push-ups and planks. This 30-day push-up challenge is perfect for beginners and experts alike.

The 30-Day Well Challenge - The New York Times

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Join the 30-Day Push-Up Challenge for Upper-Body Strength, Stability and Stamina, Livestrong.com

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