My own ambition in the ring had always been skillful boxing, speed and defense - on the order of Mike Gibbons.
If all human lives depended upon their usefulness - as might be judged by certain standards - there would be a sudden and terrific mortality in the world.
Fat is one of the chief enemies of the heart because it has to be plentifully supplied with blood and thus needlessly increases the pumping load that the heart must sustain.
A boxer's diet should be low in fat and high in proteins and sugar. Therefore you should eat plenty of lean meat, milk, leafy vegetables, and fresh fruit and ice cream for sugar.
The way to know about championship quality is to learn from champions, and that I did; studying them with professional purpose during my time in the ring and from habitual interest afterward.
In youth, we get plenty of exercise through games and running around, but as middle life approaches, we settle down, literally and figuratively.