I think they key to me being successful in the IB Program might be the fact that I never ever stopped my physical activity throughout these two years. In fact, I became even more consistent and increased the number of times I go to the gym every week. This helped me very much. Staying in shape is important so as to be healthy, but I also think it is correlated to a good mental health and stability.
I generally go to the gym 3 to 4 times a week. I prefer to go in the weekends and less times during the week, because when I have afternoon classes I come home very tired. My favorite part is definitely running, but I also enjoy the physical exercises. Sadly, I don't have a "gym buddy", so I often train alone, but it is as it is.