The nervous system and cardiovascular system
You are doing all the work yourself in individual sports! If you are running the 100 meter dash, nobody is helping you run. It's all on you. Nobody will help you play 18 holes of golf, only you can. You need better physical endurance because you get no help with another person's endurance.
The penis. did u want this answer for any work or did you want someone to search it up lol
