it's probably not that you are going insane at all from what it sounds like. it's more like you want to go insane just to do something the type of physical activity you are doing isn't the type you need it's too regimented and maybe boring you should do something more exciting like rock climbing, mountain biking, kayaking or playing paintball with people. It also could help to do something creative like playing an instrument like guitar or, drawing, or maybe poetry? you just need something to express yourself through or validate you own existence with.