Flutter Kicks, Side to Side Twists, Leg Raises and Raised Leg Circles. What an intensive workout for your abs!
Tennis players need a strong core, this is how you get one!
Disclaimer: Do not perform these exercises if you have any injury, get rehabilitation first. If you get short of breath, feel fatigued or tired during any of these workouts, stop and take a break. Consult a doctor/trainer if necessary before starting any workout session. Children should do them under supervision of an adult.
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These workouts are taken from the Darebee 30 days of HIIT program.