Conclusion Neither HIIT nor MICT is superior for altering TC , TRG , or LDL-C , or TC-HDL-C ratio .
To raise HDL-C , HIIT may result in a larger effect size compared with MICT .
Objective To compare the effects of moderate intensity continuous training ( MICT ) and high intensity interval training ( HIIT ) on  adult lipid profiles ;  to identify training or participant characteristics that may determine exercise-induced change in total cholesterol ( TC ) , triglycerides ( TRG ) , high-density lipoprotein cholesterol ( HDL-C ) and low-density lipoprotein cholesterol ( LDL-C ) .
Changes in cardiorespiratory fitness and coronary heart disease risk factors following 24 wk of moderate- or high-intensity exercise of equal energy cost.
This study was design ed to investigate the effect of exercise intensity on cardiorespiratory fitness and coronary heart disease risk factors . Maximum oxygen consumption ( Vo(2 max ) ) , lipid , lipoprotein , and fibrinogen concentrations were measured in 64 previously sedentary men before r and om allocation to a nonexercise control group , a moderate-intensity exercise group ( three 400-kcal sessions per week at 60 % of Vo(2 max ) ) , or a high-intensity exercise group ( three 400-kcal sessions per week at 80 % of Vo(2 max ) ) . Subjects were instructed to maintain their normal dietary habits , and training heart rates were represcribed after monthly fitness tests . Forty-two men finished the study . After 24 wk , Vo(2 max ) increased by 0.38 + /- 0.14 l/min in the moderate-intensity group and by 0.55 + /- 0.27 l/min in the high-intensity group . Repeated- measures analysis of variance identified a significant interaction between monthly Vo(2 max ) score and exercise group ( F = 3.37 , P < 0.05 ) , indicating that Vo(2 max ) responded differently to moderate- and high-intensity exercise . Trend analysis showed that total cholesterol , low-density lipoprotein cholesterol , non-high-density lipoprotein cholesterol , and fibrinogen concentrations changed favorably across control , moderate-intensity , and high-intensity groups . However , significant changes in total cholesterol ( -0.55 + /- 0.81 mmol/l ) , low-density lipoprotein cholesterol ( -0.52 + /- 0.80 mmol/l ) , and non-high-density lipoprotein cholesterol ( -0.54 + /- 0.86 mmol/l ) were only observed in the high-intensity group ( all P < 0.05 vs. controls ) . These data suggest that high-intensity training is more effective in improving cardiorespiratory fitness than moderate-intensity training of equal energy cost . These data also suggest that changes in coronary heart disease risk factors are influenced by exercise intensity
Conclusion Neither HIIT nor MICT is superior for altering TC , TRG , or LDL-C , or TC-HDL-C ratio .
To raise HDL-C , HIIT may result in a larger effect size compared with MICT .
Objective To compare the effects of moderate intensity continuous training ( MICT ) and high intensity interval training ( HIIT ) on  adult lipid profiles ;  to identify training or participant characteristics that may determine exercise-induced change in total cholesterol ( TC ) , triglycerides ( TRG ) , high-density lipoprotein cholesterol ( HDL-C ) and low-density lipoprotein cholesterol ( LDL-C ) .