I'm a CrossFitter, and These Are the 12 Bodyweight Moves I Do For Strong Abs

Why I do it: We often hold a plank in class for 30 to 60 seconds. It's not only a great way to increase strength in the body and flexibility in the wrists (perfect for barbell work), but I also love the mental challenge — 60 seconds is a long time!

• Balance on your hands and toes with your body in one straight line, hands underneath your shoulders and feet hip-width distance apart.
• To make this move even more challenging, elevate your feet onto a step, bench, block, or ball.
• Hold for as long as you can with correct form.