i'm over 40 years old and in the best shape of my life. >> well, sagi kalev's body beast program was unbelievable. i went from 238 to 206 -- gained some muscle in the process. >> body beast isn't a muscle-building program that women are going to get huge muscles and they're going to bulk up the same way men do. before, i didn't have a lot of definition, and i really wanted to tone up, to have arms like this that i [laughs] that i'm so proud of. >> muscle is the fountain of youth. dollar for dollar, minute for minute, this is the most effective way to train. i call it the "lift and go home" program. you just lift, and you're done. if someone asks, you know, "show me the guns," and you're able to do this, it's just fun. i never thought i would look like this, ever. >> announcer: research studies prove weight training gets you lean and ripped. but what makes body beast so powerful and able to deliver incredible results in just 90 days is sagi's unique dynamic set training. this breakthrough method combines tried and true exercises with cutting-edge sports science and decades of professi