Muscle Boost X Keep in mind that any muscle-building routine you undertake is only effective if it makes you stronger. Your ability to gradually increase the weights you are lifting is a good indication of the success of your routine. It is a fact that you ought to be able to lift 5 percent more after every two exercise sessions. Think about what you may be doing wrong if you aren’t having the progress you want. If you sense you have not gained strength since your last workout, you may not have allowed yourself sufficient recovery time.