ACSM's guidelines for exercise testing and prescription /   Guidelines for exercise testing and prescription  American College of Sports Medicine ; [senior editor, Walter R. Thompson ; associate editors, Neil F. Gordon, Linda S. Pescatello ; contributors, Kelli Allen ... [et al.]].   - 8th ed.   - Philadelphia :  Lippincott Williams & Wilkins,  c2010.   - xxi, 380 p. :  col. ill. ;  22 cm.