Another plank variation you should try once you've perfected the traditional plank is a plank with a leg lift. According to Tim, the elbow plank with leg lift reduces the stability, which means your core strength is really going to have to kick in. When performing this exercise, be sure to maintain pelvis and abdominal control, meaning don't let your hips shift or your trunk lower to the ground.
- Start in an elbow plank. Lift your left foot about six inches off the ground, keeping your pelvis parallel to the floor. Hold for five seconds, then lower the leg.
- Try the lift with your right leg.
- This completes one rep.
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