Speed and Strength: (Original Version, Restored)

"Exercises of speed increase the activity of the respiratory organs with much less fatigue of the lungs and heart than is created by strength exercises, owing to the absence of forced muscular effort. Such effort occurs only accidentally in exercises of speed, but is compulsory in exercises of strength. But exercises of speed will not develop the bulk and strength of muscle as are developed by strength work, for there is a smaller supply of blood forced into the muscles during and after spe...