Physical fitness is having ample energy and the ability to fulfil daily activities without being exhausted. My energy generally depends on the amount of sleep and food I get. If I have too much or too little sleep, I don't look forward to the day and am not enthusiastic about doing things. Unless I have a complete breakfast, it affects my energy level. When I have a good breakfast, and enough sleep, I can go through a whole day with enough energy and alertness to do many things.
1) If the author has good breakfast, and enough sleep .......
the writer can move with speed and can change his direction quickly
it makes him flexible through his daily activities
the day provides him a better endurance
he does not find an easy way of making a living
he can spend his day actively to do many things