If you are talking about a fire academy after a hiring. Being in shape physically makes a big difference. You don't want to be struggling to keep up and so exhausted that studying and learning suffers. Learn how to study efficiently, take the material given and outline it or put on index cards. For that period of time put all efforts into the training and postpone the social activities until after you are sitting at the firehouse proud of your accomplishments, then return to the normal life. Have fun again, knowing you did it right and learned the job right. Also, a lot of people struggle on the EMT side, it is intensive in studying and memorizing. It is not as glamorous as fires, but it can be a sticking point for those that can't pass it. Good luck, put all your effort into it. I remember when I was about to enter the fire academy, I refused to go roller skating with our church, because I knew if got injured that might be my only chance to get on!