How long should I do exercise

That all depends on what your health and fitness goals are. Feel free to friend me and we can chat!

I'll add that it's an incomplete picture. Are you eating for tour goals. Sleep. Ability to focus. The point is for basic fitness you are defiantly doing good if you have fed your body properly.

When advising my grandson regarding violin practice I tell him that Itzhak Perlman recommends no more than 5 hours of practice per day. He tells me that practicing 1 hour is plenty. So how long are you actually working out in the gym each day, how long swimming, how long cycling? Years ago when I had time I was in the gym for 2 hours, cycling for 1 hour and running for 1 hour 6 days per week. I rested on the 7th. I did that for about 4 years until I no longer had the time but I was in very good shape. The problem was that with a schedule like that I was lucky to have an hour to practice violin or guitar.