Indexed left ventricular ( LV ) and right ventricular ( RV ) volume ( LV , 77.18.5-83 .98.6 ; RV , 80.58.5-86 .68.1 ) and mass ( LV , 58.26.4-63 .48.1 ; RV , 14.81.7-16 .12.1 ) significantly increased with HI ( I ) T. Changes in LV and RV morphological parameters with HI ( I ) T were highly correlated with an increase in maximal aerobic capacity ( VO2max ) and a decrease in blood lactate concentration at the anaerobic threshold .