Abdominals
Crunch - Legs On Exercise Ball
A crunch with your calves resting on a stability ball, keeping the hips flexed and the abs working.
Primary musclesAbdominals
Energy burned
≈ 17 kcalFor 3 × 8–12, rest 90s · ≈ 2.9 kcal/min
Estimate range 12–21 kcal (±25 %)
Muscle mass worked4 %
Effort during a set4.5 MET
Your lean mass53.5 kgBody fat estimated from BMI and age
Body-weight exercise: your whole body is the load, so heavier people burn more.
Estimate ±25 %: muscles worked (from the exercise data), sets, reps, rest and your body. See the planner for whole sessions.
Setup
- 1Lie on your back with your calves resting on a stability ball so your knees and hips are at 90 degrees.
- 2Place your hands lightly behind your head.
- 3Brace your core.
How to perform
- 1Curl your shoulders off the floor.
- 2Keep your lower back pressed into the floor.
- 3Pause at the top.
- 4Lower slowly.
