How does the tennis pro stay in tip-top shape? Lots of squats, lunges, and burpees. Williams shared the 15-minute bodyweight workout she created with comedian Kevin Hart (he's not just funny, he's super fit) on the Nike+ Training Club app. 

We wish the app showed Williams doing the moves herself—the videos use fitness models—but it's still a fast-paced workout that will get you to break a sweat. Here’s a preview of the warm-up. Download the app to see all the moves (including burpees, of course) that help keep Williams at the top of her game.

Perform the following at a high intensity for 20 seconds each, resting 10 seconds in-between: 

  • Bodyweight Squats
  • Heel Kicks
  • A-Skips
  • Lateral Hip-Openers
  • Sprint to Backpedal
READ THIS NEXT: Workouts Top Trainers Do When They Only Have 15 Minutes
 

Take on too much in the New Year?

We'll make crushing your goals a whole lot easier by sending you a healthyish idea you can do every day.
Sign up to get healthy ideas
via Facebook Messenger
 
CLOSE

Sign up for a daily healthyish text message

Status Available in the U.S. and Canada only. Clicking "SIGN UP" means you would like to receive text messages from Greatist. Msg & Data rate many apply. Text STOP to cancel or HELP for help.