Exercise can change habits for sure. I used to do gym training (functional fitness followed by boxing class) Saturday mornings. Because of this I had a reason

Exercise can change habits for sure. I used to do gym training (functional fitness followed by boxing class) Saturday mornings. Because of this I had a reason not to drink Friday night - having an intense workout the next morning is not so fun, even after just a couple drinks... If I ate or drank something bad the day before I could tell instantly what I did wrong. So for the OP, I guess figure out what your reasons are and have some emotional buy-in if possible.