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Medicine Ball Crunch on Stability Ball

Abs Obliques Isolation Medicine ballStability ball
Demo (loops)

Exercise info

Primary musclesAbs
Secondary musclesObliques
EquipmentMedicine ballStability ball
Movement patternCore
Rep range10–20 reps
44 similar exercises

Representative exercise: Machine Lying Crunch

How GYMKC sets the weight for this exercise

This exercise starts with your bodyweight. Once you reach 10–20 reps, you add weight in 2.5 kg (5 lb) steps.

GYMKC adds reps before weight. The sets you log also decide when it is time to add weight.

These numbers are an example of how the calculation works. Your actual prescription is recalculated every set from your own records. See how the calculation works

Related exercises

This information is based on our analysis of public content from evidence-based training experts in Korea and abroad. It is not a substitute for medical advice. Weights and sets differ from person to person. The GYMKC app uses the sets you log to calculate the weight and reps for your next set.