Hard Core
4 rounds · 45–60 seconds after each round
- Hanging Knee-to-Chest12 reps
Raise the knees high and curl the hips upward without swinging.
- Medicine-Ball Sit-Up15 reps
Hold the ball at your chest and control the lowering.
- Medicine-Ball Russian Twist30 total reps
Rotate through the shoulders and torso instead of just moving the hands.
- Hollow-Body Hold30 seconds
Keep your lower back pressed firmly into the floor.


