Finding a cool hobby that can momentarily direct your attention away from the dojo is important. Yes, sometimes you've got to relax and unwind, dedicating yourself to something you like without any pressure to be the best -- zero competiveness involved.
On top of recharging your battery, a hobby like surfing or biking around town enables you to reflect and think in a way that would be impossible if you were totally focused on your training.
Understand this thesis by watching this video by Bruno Fernandes.
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