FREE WORKOUTS, HEALTH + WELLNESS Fitness Focus: The Core Challenge Posted by Erin Germaine on January 31, 2014November 17, 2021 The Core Challenge 50 Crunches 15 Push-ups 1 MIN Plank 30 SEC Side Plank (right side) 30 SEC Side Plank (left side) 1 MIN Plank 15 Pushups 50 Crunches Share this:TweetShare on TumblrLike this:Like Loading...