The tests of endurance, which were conducted by Professor Irving Fisher, of Yale, now President of the Committee of One Hundred on National Health of the American Association for the Advancement of Science, and with the cooperation of the famous athletic coach, Alonzo B. Stagg, formerly of Yale, but now of the University of Chicago - on College athletes, students of sedentary habits, and on members of the staff of the Battle Creek Sanatorium - are of prodigious importance in their relation to the possibilities of human endurance through simple Fletcherizing.

The reports include a test in what is termed "deep-knee bending," or squatting on the heels and then lifting the body to full height as many times as possible. John H. Granger, of the Battle Creek Sanatorium staff, did this feat 5,002 times consecutively in two hours and nineteen minutes and could have continued. He then ran down a flight of steps to the swimming-pool, plunged in and had a swim, slept sweetly and soundly for the usual time, and showed no signs of soreness or other disability afterwards.

Doctor Wagner gave his strenuous contribution to our knowledge of possibilities of endurance by holding his arms out horizontally for 200 minutes without rest - three hours and twenty minutes. At the end of that time he showed no signs of fatigue, and stopped only because of the weariness shown by those who were watching and counting the minutes. These statements seem like exaggerations, but they are not.

Both of these tests can be tried by any one in the privacy of his or her own bedroom.

Doctor Anderson, Director of the Yale Gymnasium, taking advantage of the cue offered by the Yale experiments, which he superintended, practised Fletcherizing in all its branches. At the end of six years he put the muscles thus purified to the test, with the result that he added fifteen pounds of pure muscle to a frame that never carried more than 135 pounds before in the half century of its existence, and demonstrated that the same progressive recuperation that I have enjoyed is open and available to others who have passed middle life.

Mr. Stapleton, one of Professor Chittenden's volunteers, grasped the same valuable cue while serving as one of the heavy-weight test-subjects in the Yale experiments. He reduced his waist measurement to thirty inches and a half, increased his chest measurement to forty-four inches; and has refined his physique until his ribs show clearly through his flesh, while his muscles mount tall and strong where muscle is needed in the economy of efficiency. In the meantime, without training other than that connected with his teaching, he increased the total of his strength and endurance more than one hundred per cent.; and reduced his amount of food by nearly, if not quite, half - as have also Doctor Anderson and myself.