Some selfishness as others have brought up and ADHD. But I think ADHD is a double edge sword in regards to sports performance. I have ADHD and while hyperfocus is great when it happens. I don't get to cherry pick when it happens or what I hyperfocus on. ADHD has also led to lots of very distracted training and nearly injuring myself. So while I think it can help sometimes, it just as often is a hindrance imo.

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