After the Sydney Olympics he stepped up to the more demanding Finn Class, meaning he had to add nearly 20 kilograms of extra body weight to be competitive in his new discipline in a bigger boat.
While it is true that you may be able to train yourself to be a morning person with discipline, we all have a natural body rhythm that makes us happiest and most productive when we honor it.
Self-discipline in terms of how you manage your life, your conduct, your body, those things and people around you becomes something you are conscious of.