accomplish this. Since your strength will shoot up much faster using 5 to 7 reps per set, so will your muscle size. 4) Lactic Acid production will be kept to a minimum. Training in the range of 5 to 7 will also decrease the amount of lactic acid that is secreted within the muscles. Lactic acid is a metabolic waste product that is produced as the body burns carbohydrates for fuel. Lactic acid accumulates in the muscle tissue at increased rates the longer you exercise. By limiting the amount of lactic acid production you will decrease muscle catabolism and create an environment in the body where greater amounts of energy can be generated. This will translate into greater power UltraLast XXL output and maximum strength potential. Okay, so we've established that a rep range of 5-7 is the absolute most effective means of stimulating muscle growth. However, this does not apply all the time or on every single lift. There are a few select muscle groups that should be stimulated using a slightly higher rep range. These are the calves, abs, forearms and upper traps. These muscle groups are predominantly made up of slow-twitch fibers, and therefore will respond better to higher reps. For this reason, a rep range of 10-12 should be utilized for these muscle groups. Again, this means that the weight should be light enough for you to complete at least 10 reps, but heavy enough that you cannot complete more than 12. A while ago, when I was searching for the ideal muscle building program, I remember opening one of those fitness magazines at the convenience stores. My initial reaction was being pumped, as I too, could be just like one of those people in the magazine without too much effort. I'm certain I wasn't alone when I decided to improve . http://healthboosterclub.com/ultralast-xxl/