00323nam a2200121 a 450000500170000008200200001710000230003724500460006025000120010626000380011830000230015670000220017920251203091610.0  a613.71,bD, jen  aJensen, Clayne, R.  aScientific basis of athletic conditioning  a2nd ed.  aPhiladelphiabLea & Febigerc1979  aviii, 374p, 23 cm.  aFisher, A., Grath