Hamstrings · Intermediate

Stability Ball Leg Curl

Hamstrings · also Glutes

Equipment: Stability Ball

How to do it

• Lie on your back with heels and lower calves on top of the ball
• Spread your arms out to the sides, palms down, abs braced
• Squeeze your glutes to lift your hips into a straight line
• Curl your heels toward your hips while keeping your hips up
• Roll the ball back out slowly until your knees are straight

Common mistake

✕ HIPS DROPPING AS YOU CURL → ✓ KEEP HIPS LIFTED THROUGHOUT

Starting point: 3 sets × 8–12 reps, 60s rest.

In the app: rotate the 3D model, slow it down and watch the mistake next to the correct form.

Cues checked against: acefitness.org.