Exercise 6.86 in the Low Back section of Chapter 6 of Advanced Concepts of Strength & Conditioning for Tennis. Watch the movement, then review the setup and progression below.
Rest the hips and trunk on a physio ball, support the upper body on the forearms, and keep the legs extended. A coach holds the ball steady.
Raise one leg to a controlled extension, pause briefly, and lower it while the other leg remains supported. Keep the trunk stable on the ball.
The video shows the coach stabilizing the ball and the athlete extending one leg at a time.
Equipment: Physio ball and exercise mat; coach assistance
Book Difficulty Level: 1 of 5
Browse Strength For Performance exercises or explore tennis workouts for a complete training session.
For the canonical technique and difficulty level, see Advanced Concepts of Strength & Conditioning for Tennis, exercise 6.86.