6 Ways to Make Your Planks Even More Effective

Another move that tones your arms, butt, and core is this triceps kickback variation.

• Start in a plank position holding a weight in each hand. Bend your left elbow and pull it up so it's in line with your shoulder.
• Pull your navel toward your spine to engage your abs, which will help you stay balanced.
• Exhale as you do a triceps kickback by extending your left hand behind you. Inhale to bend your elbow. This counts as one rep.
• Complete 10 to 15 reps on each side.