У вашего броузера проблема в совместимости с HTML5
For interval Training Part I, Visit:
https://www.youtube.com/watch?v=vkGZ20zZC0w
Sandy Morvillo (AFFA certified for Group Fitness & Personal Training, CLMT), health and fitness expert, trainer, mentor, licensed massage therapist is a 40-something, married mother of two young boys who resides in Massachusetts. She is currently the Group Fitness Director of Summit Health Club in Bedford, Massachusetts and has just launched fitness shows on Bedford TV (http://bedford.tv). Keep watching for more episodes on YouTube, and follow Sandy at http://www.sandymorvillo.com/.