Practising how to lose
The puzzle
He practises losing every single day.
His coach keeps telling him to lose better.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
He is learning breakfalls in judo.
Landing safely when you are thrown is the first thing a beginner is taught, and you drill it every session for years.