Changes in VO2max and maximal treadmill time after 9 wk of running or in-line skate training.
Melanson EL, Freedson PS, Jungbluth S. Changes in VO2max and maximal treadmill time after 9 wk of running or in-line skate training. Med Sci Sports Exerc. 1996 Nov; 28(11):1422-6.