references
American Council on Exercise: "Strengthen Your Abdominals with Stability Balls"
Harvard Health Publishing: Have a ball with exercise
Mayo Clinic: Core-strength exercises with a fitness ball
The right size stability ball will allow you to sit or work out comfortably.
Image Credit: Westend61/Westend61/GettyImages
Image Credit: Westend61/Westend61/GettyImages
Source: American Council on Exercise
Source: American Council on Exercise
To make this exercise more difficult, raise the ball off the ground and lower your legs slowly toward the right. Right before you touch the ground, hold the position for three deep breaths. Then, return to the starting position and repeat this movement on the left side.
American Council on Exercise: "Strengthen Your Abdominals with Stability Balls"
Harvard Health Publishing: Have a ball with exercise
Mayo Clinic: Core-strength exercises with a fitness ball
