Core · Beginner

Crunch

Abs

Equipment: Mat

How to do it

• Lie on your back, knees bent, feet flat on the floor
• Fingertips lightly behind your head, elbows wide
• Exhale and curl your ribs toward your pelvis
• Lift until your upper back clears the mat, low back stays down
• Lower slowly with control, keeping your abs engaged

Common mistake

✕ YANKING THE HEAD FORWARD → ✓ ELBOWS WIDE, CHIN OFF CHEST

Starting point: 3 sets × 12–20 reps, 45s 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, howdyhealth.tamu.edu.