Corgel said these work your oblique muscles.
- Start in a side elbow plank on your right side with your feet stacked on top of each other or staggered with your left foot in front. Hold a dumbbell in your left hand.
- Keep your glutes engaged and abs pulled in.
- Reach your left arm up high with the dumbbell raised above your head.
- Slowly lower the weight down and, twisting from your ribcage, bring it toward the gap between your body and the floor.
- Rotate your ribcage back to center and return your arm overhead to the starting position. Do not let your hips drop.
- This counts as one rep. Repeat the same number of reps on the opposite side.
- You can modify this move by resting your lower leg on the ground with the knee bent at a 90-degree angle.