Get lean, build muscle, and stay healthy in only ten minutes a day A Fitness Hall of Fame inductee and world-famous exercise scientist explains the #1 new fitness trend and how to get and keep the Body you\'ve always wanted.
Len Kravitz, who has been inducted.
In Hiit Your Limit , Dr.
High-Intensity Interval Training (HIIT) is an extraordinarily effective form of Training that mixes high- and low-impact activities during periods ranging from seconds to eight minutes.
Get lean, build muscle, and stay healthy in only ten minutes a day A Fitness Hall of Fame inductee and world-famous exercise scientist explains the #1 new fitness trend and how to get and keep the Body you\'ve always wanted