Hi. For the past few years, when I would 'go running' it would always be a long run. I think sprints might be a better training tool for parkour, for the purposes of anaerobic leg power. I tried to do them yesterday and I realized I had no idea how to make a structured workout with them, and ended up doing 4 sets of sprinting from one end of the gym to the other and back 5 times with 30 second rests in between sprints. Any help? Thanks in advance!