Core training has always been part of military PT and fitness testing. From crunches to sit-ups, flutter kicks, leg tucks and plank poses, the U.S. military uses many exercises to test core strength.

Shilpa Shetty has shared the key to achieving toned abs with a fun physical activity, which incorporates flutter kicks with a tennis ball. See how to do it effortlessly.

Shilpa Shetty highlights the benefits of flutter kicks for core strength, muscle endurance, and balance, and recommends using a tennis ball.  ...