Overhead Leg Raise with Under-Knee Clap

1. Start standing with your feet shoulder-width apart and your arms extended out to the sides at shoulder height.

2. Engage your core and lift one leg straight up in front of you while simultaneously raising both arms above your head.

3. Clap your hands above your raised leg, keeping your leg as straight as possible.

4. Lower your leg and arms back to the starting position.

5. Now lift the same leg again, but this time, bend your knee and lift it towards your chest.

6. As you do so, bring your arms down and clap your hands under your raised knee.

7. Return to the starting position with your leg down and arms extended to the sides.

8. Alternate legs and repeat the sequence for the desired number of repetitions or duration.

This exercise targets the abdominal muscles and hip flexors, with the added movement of the arms involving the shoulder muscles as well. It's suitable for those looking to improve core strength and coordination.