If an injury or tiredness forces us to rest for a while, we can use this time well. These moments of observation are no different than physical practice. We maintain a focussed attitude and keep a sense of effort. It is important no to forget that intensive work requires quality rest time. It is important to sleep enough and eat reasonably, in quantity as well as in quality.
Athletes tend to abuse alcohol.
This should be avoided. It is good to eat lightly an hour before training and to wait at least half an hour after. Drinking cold while the body is hot should be avoided. One should wear a clean keikogi so as not to upset training partners. Hands and feet should be clean and nails cut short.