Exclusive: Serena Williams on her Nike Training Club CorePower workout app

Serena Williams, the number one ranked female tennis player in the world, has condensed her recipe for a strong core into a 15-minute training app which launches tomorrow.

The 31-year-old claims that CorePower, the name of her workout with Nike Training Club, is like "having a personal trainer on your phone."

With a stability ball and resistance bands, Williams demonstrates drills that are what she calls a "great supplement to do after running, riding the bike or other cardio" designed to increase overall core strength while helping to create a lean, strong body.

A devoted Williams told The Telegraph: "When I'm on the road and need a quick workout, I can do an NTC in my hotel room; or if I feel like I need something extra after a training session, I can target a specific muscle group with the 15 minute workouts." Not a fan of weight-based training, the tennis pro focuses instead on resistance methods, which is reflected in the app.

Williams, who has won 46 World Tennis Association titles, joins fellow tennis player Maria Sharapova in creating a workout for the app, as well as Rihanna's trainer, Ary Nuñez.

She admits how she can be "just like everyone else when it comes to training - and I have my days where it's tough to get into that gym", but reveals that great workout gear can make all the difference.

"A good gym outfit can give you that extra boost to get to the gym, or maybe run a little bit longer than last week because you know you look good doing it."

So grab your best leggings, download Serena's workout first thing tomorrow and those world-class abs will be with you faster than you can say 'let!'….

What to expect from Serena's new workout app:

For more information visit: www.facebook.com/niketrainingclubuk

Via: Exclusive: Serena Williams on her Nike Training Club CorePower workout app