sagi definitely motivated me. no messing around -- he tells you what needs to be done, and you do it. my stomach has definitely changed. my chest, my shoulders are really filling out. it's totally changed my whole life and gave me a much more positive attitude. >> announcer: the secret proven to change your body at home in just 90 days is sagi's trademark dynamic set training, a unique nonstop combination of sets, reps, resistance, and recovery. this powerful training system is proven to accelerate extreme fat-burning and explode head-turning muscle definition. >> dynamic set training works. it worked for me. it worked for hundreds of my clients. and now it will work for you. let's show them what progressive set is all about. we're gonna start with a lighter weight. go to 15 reps to pre-fatigue your muscles. after 15 reps, we're gonna go down to 12 reps, as we go into the heavier weight. adding more weight accelerates growth. after 12 reps, go down to 8 reps. we're gonna go to the heaviest weight. remember, there'