So, you’ve decided to bulk up, huh? Good for you! The good news is that you’ve done the hard bit, you’ve made the decision to work on your body and you are now taking steps to achieve it. But, if you were hoping that you could just smash out some bicep curls at either end of the day and eventually turn into Hercules, you’re in for a disappointment. Putting on muscle requires more than just doing exercise. Obviously, the exercise that you do will have a significant impact on how quickly and efficiently you build muscle. However, this is only one part of a complex equation. You need to not only work out right, you need to also make sure that you are using the time in between workouts in the right way. If you aren’t building muscle despite all your best efforts, here are some of the most likely reasons why.