Popsugar Fitness Workouts Bodyweight Core Exercises 12 Easy-to-Follow Moves That Chisel Your Core August 6, 2015 by Lizzie Fuhr View On One Page Photo 8 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 8 Mountain Climber Start in a traditional push-up starting position — shoulders over hands and weight on just your toes. Bring your right foot forward, bending the knee and putting weight on the ball of your foot. Switch legs, bringing the left knee forward while moving the right leg back. This completes one rep. Previous Next Start Slideshow WorkoutsStrength TrainingAb Exercises