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Last updated March 5, 2026
Abs
Crunch (On Bench)
Lie on a bench with feet flat. Crunch up. Prevents you from cheating by using momentum from the floor.
Quick facts
- Level
- Beginner
- Mechanic
- Isolation
- Force
- Pull
- Type
- Strength
- Injury Risk
- Low
- Hypertrophy
- Low
- Calorie Burn
- Low-Medium
Muscle focus
Primary and secondary muscle groups targeted by this movement.
Primary
Abs
Secondary
Deep Abs / Core
Equipment & setup
What you need and how to position yourself before starting.
Equipment
Flat Bench / SofaBody Weight
Movement pattern
Bilateral
Posture
Lying
Tracking parameters
repsweight
Step-by-step instructions
Follow these cues to master proper technique and stay safe through every rep.
- Step 1Setup
- Lie down on a flat bench with your back pressed against it.
- Position your feet flat on the floor, hip-width apart, and ensure your knees are bent at a 90-degree angle.
- Step 2Position Your Hands
- Place your hands behind your head or cross them over your chest.
- If placing hands behind your head, ensure your elbows are wide and not pulling on your neck.
- Step 3Engage Your Core
- Tighten your abdominal muscles to stabilize your core.
- Keep your lower back pressed against the bench throughout the movement.
- Step 4Perform the Crunch
- Exhale and lift your upper body off the bench by curling your torso towards your knees.
- Focus on using your abdominal muscles to lift, not your neck or shoulders.
- Step 5Hold the Position
- At the top of the movement, hold for a brief moment to maximize contraction in your abs.
- Ensure your neck remains relaxed and your gaze is directed towards the ceiling.
- Step 6Lower Your Body
- Inhale as you slowly lower your upper body back down to the starting position.
- Maintain control throughout the movement to avoid using momentum.
- Step 7Repeat
- Perform the desired number of repetitions, ensuring to maintain proper form with each crunch.
- Step 8Finish the Exercise
- After completing your reps, carefully sit up and swing your legs off the bench.
- Take a moment to stretch your abs and relax before moving on to your next exercise.
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