1[2]Pate,RR.Guidelines for exercise testing and prescription Athed,Lea & F ebiger,1991.99-102.
2[3]Mcardle.WD.Exercise physiology 3th ed Lea & Febiger,1991.434-437.
3[7]Borg,G.A.V.perceived exertion:A note on history and methods.Medicine and Scie nce in Sports,1973.35-37.
4[8]Davis,J.A.,Frank,M.H.,Whipp,B.J.,and Wasserman,K.Anaerobis threshold alterati on caused by endurance training in middle-aged men.Jounmal of Appliology,1976,41:544-550.