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.

Many complain of a chronic weariness that sleep will not banish. Their trouble is that too little blood is pumped through the body per minute; this sluggishness, permitting poisonous waste matter to accumulate in every cell, clogs the channels of energy.

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.

Handball, swimming, running, jumping, basketball, and boxing were as much a part of me as breathing.

But I do say that, if you will regularly devote 15 minutes a day, preferably before breakfast, for 60 days to the simple set of exercises that I devised for conditioning men in the navy, I guarantee that you will enjoy increased physical buoyancy and mental vigor.

In youth, we get plenty of exercise through games and running around, but as middle life approaches, we settle down, literally and figuratively.

I did six years of planning to win the championship from Jack Dempsey.