Another sport activity, that I enjoy a lot, is exercising at the gym. I started going to gym when I was 16, since then I have been working out, on and off. I love the atmosphere at the gym. In my opinion by exercising on machines you can build your muscles very fast. The recommended sets are 12 repetitions for 3 sets. Start with the lowest weight possible and then increase slowly. It is not recommended to work on the same muscles every day. So, you can work out on different muscles groups and you won’t harm yourself. Take it easy on yourself. Try to alternate and workout every other day. I would really recommend going to the Jacuzzi after your routine, but no more than for 10 minutes, or swim in a warm swimming pool (if your gym has one).
Enjoy your training sessions!