Lawrence E Armstrong1, Evan C Johnson2, Michael F Bergeron3. 1. Department of Kinesiology, Human Performance Laboratory, University of Connecticut, Storrs, CT. Electronic address: lawrence.armstrong@uconn.edu. 2. Division of Kinesiology and Health, Human Integrated Physiology Laboratory, University of Wyoming, Laramie, WY. 3. Youth Sports of the Americas, Birmingham, AL.