My dad used to be a triathlete, so he always wanted his kids to do the same. He wanted us to be runners. I remember him taking me to the track and jogging with me, we would run until even the dog gave up and watched us from the center. When I wanted to quit he would keep saying "mind over matter" and stopped me from quitting. It was a bit psychotic, but I can push through some serious discomfort these days if I want to. I still hate cardio though.