Krista Stryker is a certified personal trainer and the founder of 12minuteathlete.com, a website providing free, incredibly effective high intensity interval training (HIIT) workouts and awesome fitness motivation for athletes of all levels. Check out the 12 Minute HIIT Workouts iPhone app or sign up to her newsletter for more workout and fitness inspiration.
View quick clips of all the exercises in the 12 Minute Athlete Workouts!
For full workouts 3x a week, visit http://www.12minuteathlete.com.
And check out the official 12 Minute Athlete iPhone app: http://www.12minuteathlete.com/app