У вашего броузера проблема в совместимости с HTML5
Sam and Brittney take on the challenge of how many burpee's in 1 minute! Sam Burpee (press up) score - 31 Brittney Burpee score - 32 The Burpee is a full body exercise used in strength training and as aerobic exercise. It is performed in four steps, and was originally known as a "four-count Burpee": - Begin in a standing position. - Drop into a squat position with your hands on the ground. (count 1) - Extend your feet back in one quick motion to assume the front plank position. (count 2) - Return to the squat position in one quick motion. (count 3) - Squat Thrust jump to return standing. (count 4) Make sure you post video response and send us your times! Train Hard! http://www.facebook.com/TheFitFreakz http://www.twitter.com/TheFitFreakz