Naomi Osaka's At-Home Exercises Will Work Your Lower Body, Back, and Core

Osaka said she does a light warmup before her workout, and one of the moves is a kneeling quad stretch. She does this without holding her back foot.

• Begin in a runner's lunge with your right foot forward. Slowly lower your left knee to the floor.
• Take a few moments to find balance, and once you're stabilized, grab your left foot with your left hand.
• Hold for 30 seconds, then switch sides.
• Osaka does this three times on each side.