Having a well-planned and challenging workout regimen is the most important feature of your gym experience. We won't question that. However, in order to follow through and achieve your goals, you need to come prepared to beast out the whole workout. Of course, your gym bag is essential, to be precise, the items packed inside. You can't train without those gym essentials. So, in order to avoid those situations where you come to the gym and realize that you've forgotten something essential, we decided to create this list for…