Endovex Your intensity and effort should always be at 100% when you are training. If you want to see real muscle mass increases, Endovex you have to push yourself to your limit when you work out at the gym. Increasing muscular stress by working out will produce more Endovex testosterone.Exercise your leg muscles just as hard as your exercise your upper body. You may already know that growth in the chest, back, and Endovex arms will be stimulated by intense training of the legs. The increased testosterone produced through leg training exercises is one of the reasons for this.