I have played soccer as a defensive midfielder. Generally speaking, midfielders are particularly active positions, which tend to require more endurance than explosive strength. And defensive midfielders have more opportunities to touch the ball, both defensively and offensively, and requires even more stamina than other midfielders.
I don’t know if that’s why, but I’m a bit slender as a soccer player. I sometimes get compliments on how long my legs look.

Recently, I have been practicing soccer more than before. So I have become even more slender than in this photo. It doesn’t seem like the more I practice, the more muscular I become.