Calisthenics

>>42452250
>lack of time
>I'm going to do something that will require more time
unless you're sporting a special DeLorean, it will be quite counter-productive
you're unlikely to have lessons from 8 to 18, from Mon to Fri
and even if you were, you'd be able to find ~45 minutes at the gym at lunch time or something, people with a fucking job can do it
>holding my gains
rather than doubling the time to exercise for your "gains" focus on your college gains now
two fullbody a week in gym may be enough to "hold your gains" way better than a hours in the evening doing calisthenics
there's a limited amount of hours in a day, and that amount is always 24

>>42452334
>you're unlikely to have lessons from 8 to 18, from Mon to Fri
well, i do have classes from 8 to 18 from Mon to Thu with only one hour lunch

and i used to be in the gym for 90 min
additionally, i gotta walk 15 min to and from the gym and there is a park with calisthenics stuff right beside where i study

>>42452410
same.
hit the gym on friday and sunday with two fullbody. you're not going to do calisthenics between classes. you could go to a college gym and shower once you're done, if your college has such a facility.
even if you had to commute and waste a whole hour every time you hit the gym, it would still be better (time-wise) than doing calisthenics.
Anyway, you know, I'm not here to convince you. Some people have to find how stuff works and how stuff works for them with trial and error. Good luck and double check your priorities; time is a limited resource.