Not sure what stage of the process you are in, but even if some of this doesn't apply to you, maybe some freshman will see this and gain some insight.
I play DI lacrosse and it is definitely doable, and dare I say, enjoyable. Are you going to have to spend a few Sat nights in, when all your teammates are out? Yea, absolutely. This is a good time to really, really reflect on why you want to do medicine. What is motivating you to spend 300k and 4+ years in school while, I assume, that most of your athletic connections would help secure you a finance/IB job? Have you figured that out?? Good, write it down, frame it, laminate it, and put it somewhere you can see it for the majority of your day. I'm not here to give you some bull**** inspirational speech, but can only speak for what I have done to help me balance this craziness. Moving on...
It is important to be totally honest with your coach. Tell him how much this means to you and I can only hope that he will respect you for chasing your dream. This might mean coming 15 mins late to a practice or having to leave a little early to get to that Orgo review session. With that being said, schedule your classes wisely and try and use as much foresight as possible during this process. While being open with your coach is important, being open with your professors is also integral to your success. If you can't make the scheduled office hours because you guys have a workout, tell the prof. and actively seek to meet with him/her at another time. My personal advice to tackle lab courses is to try and bang them out over the summer. I know SDN might freak out at this comment and say admissions folk will frown upon this but frankly, they are human beings and will understand that practices take up 4 hrs a day and labs over the summer are a necessary evil. Plus, if you take it at your home institution, its not that big of a deal AND you can spend the summer running and lifting w the strength and conditioning coach FOR FREE!!
From an athletics POV, do not ever, EVER let your premed studies be an excuse for poor performance on the field or in the weightroom. Even if you were up till 3am working on the physics Pset and have to get up at 6 for the lift, I dont care what you do, find it within yourself to dominate the day. The second that you attribute poor performance to pre-med life, you start using that excuse more and more often. It is a cancer and your coach and teammates will sniff it out. I know the wording is strong, but I learned the hard way my freshman year and was lucky enough to get a second chance, most are not.
As far as GPA and MCAT scores are concerned, and again some may not like this advice, you need to learn how to play "the game." Sure, take Biochem and Genetics, but also take that class that all the upperclassmen tell you is a "hidden gem." You may have to end up balancing a B in Biochem with that A elsewhere. And yes, I realize that AMCAS breaks it down into BCPM but it is always important to have a respectable cGPA as well. If you dont want to take a year off, your junior year is going to suck. If you plan correctly, start studying for the MCAT early, devise and stick with a study plan, and do all the other hints/tips you hear around here, it will suck less. Not sure what else to say, thats just the way its gonna be. Granted, you will still have time to go out one or two nights a week, you will just have to be impeccable with your time management. Also, use away trips and bus rides to your advantage - invest in noise cancelling earphones and get some work done whenever you can.
Again, I dont know you and dont know what you do for fun/to let loose, but I do know the football guys here at my school. Cut day parties out of your vocab. They are too big of a waste of time. It turns out, being drunk for 12 hours is NOT a good use of time. Sorry if that is athlete stereotyping but its just a reality at my school so I thought I would address it. Trust me it was a heartbreaking realization.
Lastly, you have something that 90%+ of the applicants do not have. Leverage that to the max. Do not come off as a dumb jock, but find eloquent ways to integrate athletics, and the LESSONS THAT YOU LEARN THROUGH SPORT into your application. Being a stud in Oklahoma drills doesn't matter to med schools - but the the fact that you are immersed in a team environment, have tangible proof of your time management, showcase a commitment to a cause greater than oneself, and complete the studies that other complete despite a 30 hr/week time commitment will get their attention. With that being said, do something (literally anything you are passionate about) that is not strictly football. It could be football related (ex. start a youth league or something, idk) but you cannot be solely defined by your sport.
Best of luck, feel free to pm for any advice, and sorry if I hurt any feelings with some blatant athlete stereotyping