Illustration of Crunch exercise

Crunch

A fundamental abdominal exercise that targets the rectus abdominis, strengthening the core and improving stability.

Beginner
BodyWeight

Muscle Targets Visualizer

Muscle Targeting Visualizer

Full Body
core Muscles
Full Body
core Muscles

Primary Muscle

Rectus abdominis

Secondary Muscles

Internal obliques
External obliques
Spinal stabilizers

Strength Level Tracker

Weight Unit
Gender
Beg
Nov
Int
Adv
Eli
WC
44
66
88
110
132
176
Enter body weight and lift weight to estimate strength level

Track Your Progress Like a Pro

Crunch

Average of all records in a cycle

74%
216.7 lbs
79%
219 lbs
Est. 1RM (lbs)Current: 219Average: 216.7

Step-by-Step Instructions

1. Starting Position

Lie on your back with knees bent and feet flat on the floor. Place your hands behind your head or across your chest.

  • Keep your lower back pressed to the floor
  • Maintain a neutral spine

2. Crunch Upward

Slowly curl your upper body towards your knees, engaging your abdominal muscles. Avoid pulling on your neck.

  • Focus on controlled movement
  • Breathe out as you crunch up

3. Hold at the Top

Pause briefly at the top of the movement, feeling the contraction in your abs.

  • Maintain a steady and controlled position
  • Don't let your lower back lift off the floor

4. Lower Slowly

Slowly lower your upper body back to the starting position, maintaining control and feeling the tension in your abs.

  • Keep your lower back pressed to the floor
  • Avoid letting your head and shoulders drop

Form Tips

Neck Position

Avoid pulling on your neck. Keep your chin slightly tucked.

Core Engagement

Focus on engaging your core muscles, drawing your belly button towards your spine.

Controlled Movement

Perform the exercise slowly and deliberately, avoiding using momentum.

Lower Back Position

Keep your lower back pressed against the floor throughout the exercise. Avoid arching your back

Common Mistakes

Pulling on the neck

Keep your hands lightly behind your head or across your chest. Focus on engaging your abdominal muscles, not your neck muscles.

Arching the lower back

Keep your lower back pressed firmly to the floor throughout the exercise. Engage your core to maintain stability.

Using momentum

Perform the exercise slowly and with control. Focus on the contraction in your abdominal muscles.

Going too far down

Only go as far as you can comfortably without straining your lower back. Focus on the quality of the movement over the quantity of reps.

Not engaging the core

Focus on drawing your belly button towards your spine during the movement.

Alternative Exercises

  • Reverse Crunch
  • Bicycle Crunch
  • Cable Crunch
  • Hanging Leg Raise

Complementary Exercises

  • Plank
  • Side Plank
  • Russian Twists