I can give you advice about the exercise. If you over-train you tax your central nervous system. When you do that, your body can't recover quickly enough. For bodybuilders it's called over-training. Even the big boys only spend about an hour a day 3 to 4 days a week in the gym. Any more than that and they are doing something wrong. Rest is a big part of being healthy. If you like the gym, go 3 or 4 days a week with a day between to rest. If you still have energy on those days, go for a walk, take up a sport, but be sure not to over-do it on those days.