To simply answer this, well im 14 & turning 15 this year. My most peaceful times started when I got into calisthenics, and muscle resistance training. Before I started working out. I had a weak mentality. I was part of the "ordinary" in the society I'd include myself in. I had social frustration at the same time I was deemed weak, and bullied bc im short, and was asian in my school. One day a sudden wave of motivation hits me, and I decided to change. Now 8 months into working out I completely transform, its almost as if everyone around me had different opinion when I shown my growth in the gym. And my performance shocked everyone. That was the best time, and I would continue to push for further goals.
Thanks for the points, and enjoy the story. :)