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.
Answer:
Sounds like Congenital insensitivity to pain with anhidrosis (CIPA)
Explanation:
Congenital insensitivity to pain with anhidrosis (CIPA) is a rare autosomal recessive disorder of the nervous system which prevents the feeling of pain or temperature, and prevents a person from sweating.