Is it good idea to work as a fitness trainer during college?

Im in college and im finishing up my basics. I also work part time in retail. I tired of working in retail with low pay and no chance for advancements. I am thinking about getting certified as a fitness trainer and working as a trainer and going to college at the same time. Do you think its a good idea...or should i stick to my current retail job?Is it good idea to work as a fitness trainer during college?yea dude if it dosent effect your studies and your goals