Fox, Edward L. <br/><br/>
Interval training; conditioning for sports and general fitness / 
by Edward L. Fox, Donald K. Mathews. 
 - Philadelphia :  Saunders,  1974. 
 - x, 281 p. :  ill. ;  21 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0721638287 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Exercise.<br/>Physical fitness.<br/>Sports--Physiological aspects.