Crunch (on bosu ball)

Crunch (on bosu ball)

The Crunch is a classic abdominal exercise that targets the rectus abdominis, commonly known as the "six-pack" muscles. Adding a Bosu ball to the mix adds an element of instability, engaging your core even further. To perform a Crunch on a Bosu ball, you start by positioning yourself on top of the Bosu ball with your lower back firmly grounded on the center of the ball and your feet flat on the floor. Place your hands lightly behind your head, elbows wide open. From here, engage your core by pulling your belly button towards your spine. Think about lifting your chest towards the ceiling while maintaining a neutral neck position. Exhale as you curl your upper body off the ball, aiming to lift only your shoulder blades off the surface. Avoid pulling on your neck or straining your back. Keep the movement controlled and focus on really squeezing your abdominal muscles at the top of the crunch. Inhale as you slowly lower your upper body back down to the starting position, maintaining that engagement in your core throughout the entire movement. By performing Crunches on a Bosu ball, you not only challenge your core muscles but also enhance stability and balance. Remember, always listen to your body, maintain proper form, and progress at a pace that suits your fitness level. Incorporate this exercise into a well-rounded abdominal routine for maximum benefit.


  • Start by sitting on the bosu ball with your feet flat on the ground, hip-width apart.
  • Lean back slightly, keeping your back straight and your core engaged.
  • Cross your arms over your chest or place your hands behind your head, whichever is more comfortable for you.
  • Engage your abs and slowly lift your upper body off the bosu ball, curling your torso toward your thighs.
  • Exhale as you crunch, focusing on contracting your abdominal muscles.
  • Pause for a second, and then slowly lower your upper body back down to the starting position.
  • Repeat for the desired number of reps.
  • Remember to maintain proper form throughout the exercise and avoid straining your neck or using momentum to lift your body.

Tips & Tricks

  • Engage your core throughout the entire movement for maximum effectiveness.
  • Focus on exhaling and contracting your abs as you crunch up.
  • Slowly lower yourself back down to maintain control and prevent any jerking motions.
  • Use a controlled pace and avoid using momentum to perform the exercise.
  • Place your hands lightly behind your head to support your neck but avoid pulling on it during the movement.
  • Keep your gaze forward or slightly upwards to maintain proper spinal alignment.
  • Incorporate variations such as oblique crunches or reverse crunches to target different areas of your abs.
  • Combine your crunches with a healthy and balanced diet to reduce body fat and reveal your toned abs.
  • Remember to warm up your core muscles before starting the exercise to prevent any injuries.
  • Ensure that the bosu ball is properly inflated and stable to provide a solid base for your crunches.


Turn Sweat into Strength and Success

Achieve more with Fitwill: explore over 5000 exercises with images and videos, access built-in and custom workouts, and see real results.

Start your journey. Download today!

Fitwill: App Screenshot
Fitwill stands in solidarity with Ukraine