I think that a lot of people play sports in high school, were in reasonable shape then, and then find themselves in their 20's/30's/etc. in worse shape and unin

I think that a lot of people play sports in high school, were in reasonable shape then, and then find themselves in their 20's/30's/etc. in worse shape and uninspired by the routes they can take to get fit. I remember hating running suicides on the basketball court, but I got into better shape running those than I do running on the treadmill, which I find largely tedious and am constantly finding ways to keep my mind entertained/distracted. There is also the team aspect. When we did conditioning, we had coaches sharing the same experience. I don't get that running, lifting by myself, doing P90x, or other solitary workouts. I've never done Crossfit, largely because I find their power lifting routines dangerous, but I can certainly understand why more extreme group exercise is really increasing in popularity. I think a lot of people grew up exercising in similar conditions, know that it worked for them then, and want to find something similar later in life.