Final answer:
Proper abdominal crunches on a stability ball provide benefits such as improved core strength and stability, increased range of motion, and reduced strain on the back and spine.
Step-by-step explanation:
Performing proper abdominal crunches on a stability ball provides several benefits and advantages. First, the stability ball creates an unstable surface, which engages more muscles in your core, including the deep muscles of the abdomen. This helps to improve overall core strength and stability.
Second, the stability ball increases the range of motion of the exercise, allowing for a greater contraction of the abdominal muscles. Lastly, using a stability ball can help reduce strain on the back and spine, as the ball provides support and cushioning.