Sharkey, a fitness researcher, retired educator at the U. of Montana, and author, offers a guide that uses illustrations, charts, and graphs to show how different types of exercise and activity work and how the body changes with increased activity, along with providing specific exercises and programs. He outlines aerobic and muscular fitness, training, exercises, and personalized programs; nutrition and weight control; dealing with conditions like muscle soreness, cramps, knee pain, and arthritis; myths and facts; and adding vitality and longevity to life by being active now. Annotation ©2010 Book News, Inc., Portland, OR (booknews.com)