Core Clock
12-minute intervals · 40 seconds work / 20 seconds transition · Record reps each interval · total reps + station output
- Hollow Rocks40 seconds · record reps
Keep your lower back pressed down as you rock smoothly without losing the hollow position.
- Hanging Straight-Leg Raise40 seconds · record reps
Keep the legs long and raise them with your trunk instead of swinging from the bar.
- Side-Plank Reach-Through40 seconds · record reps
Hold a strong side plank and rotate the top arm underneath without letting the hips drop.
- Medicine-Ball Russian Twist40 seconds · record reps
Rotate through the shoulders and torso while keeping the ball controlled close to the body.


