When working out, it is better to increase the amount of weight you are lifting each week. Push yourself into the limit of your body. It is better to complete the required number of repetitions before increasing the weight you are lifting. Knowing the maximum weight you can raise will help you to gain mass and grow big. Sadly, doing this can be so boring when working out. The other motive rest periods are essential is because the way Muscle Building works. You are essentially producing tiny micro injuries in your tissues when you work out. When you rest, the body fixes the muscles and makes them tougher as compared to before.

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