""Dr. Armstrong's book contains invaluable knowledge for the outdoor enthusiast or athlete who will be training, competing, or participating in strenuous activities under extreme conditions.""
Former Marathon World Record Holder
American record holder: 5,000 and 10,000 meters
""This very reasonably priced book by Dr. Larry Armstrong presents an updated and authoritative review of human exercise performance at the environmental extremes of heat, cold, high altitude, and hyperbaria (diving). In addition, this 300-page book provides useful information on the influence of air pollution, biological rhythms, time zone changes, and sleep loss on exercise performance. It is easy to read and a must purchase for undergraduate and graduate students in environmental physiology, interested athletes, and scientists concerned with these topics.""
Dr. Kent B. Pandolf
Senior Research Scientist
U.S. Army Research Institute of Environmental Medicine