Exercise Library
Crunch (on Stability Ball) Waist Max
Positioned on a stability ball at the Waist Max station, you curl your torso up against the machine's resistance while the ball adds a balance challenge underneath you. The unstable base recruits the obliques more than crunching on a flat bench.
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Primary muscle
Primary: Rectus abdominis Secondary: Obliques
Equipment
Stability Ball
Category
Abs
Track This Exercise in the App
Log your crunch (on stability ball) waist max sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.