johannasmith_teamfinishstrong: Part of what makes the 21 Day Fix Extreme such a fat shredder - in addition to the dialed-in, portion control nutrition - is the focus on leg exercises. These are the largest muscle group in the body; the more you work them, the faster and more efficiently you burn fat. Even in workouts like Upper Fix, you're still working the legs HARD. Just ask mine. 😉 They completely agree. 🔥🔥🔥🔥🔥 #fitnessjourney #fitnessmotivation #health #healthylifestyle #over40 #mommyoftwo #21DayFixExtreme #21DFX