How to Do the Ab Crunch Bosu Ball Exercise

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By Emmalee Schmidt
eHow Contributing Writer

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This exercise is designed to target your abdominal muscles.

Difficulty: Easy

Instructions

Step 1

Begin by lying on your back on the BOSU ball.
Step 2

Keep your knees bent at shoulder-width and place your hands behind your head.
Step 3

Pull your abs in tight and crunch up toward the ceiling, then return to the starting position.
Step 4

An advanced crunch on the BOSU ball is the same exercise with your legs directly together or raised off the floor at a 90-degree angle.

Tips & Warnings

Pull in your stomach throughout this exercise. This will ensure the safety of your lower back and target your abs directly.
Do not attempt this exercise if problems with spine exist.

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