Plank Weight Shifts
- Set the KoreFit® control knob to a Level 2, 3, or 4.
- Start with your hands under your shoulders.
- Slightly bend your elbows and keep your neck relaxed
- Engage your abdominals and don’t let your lower back sag.
- While maintaining your abdominal strength, start to push down one ballast and then switch to pushing down the other ballast.