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 ) .
High-intensity interval and moderate-intensity continuous training elicit similar enjoyment and adherence levels in overweight and obese adults
Abstract Background : High-intensity interval training ( HIIT ) has been shown to improve cardiometabolic health during supervised lab-based studies but adherence , enjoyment , and health benefits of HIIT performed independently are yet to be understood . We compared adherence , enjoyment , and cardiometabolic outcomes after 8 weeks of HIIT or moderate-intensity continuous training ( MICT ) , matched for energy expenditure , in overweight and obese young adults . Methods : 17 adults were r and omized to HIIT or MICT .  After completing 12 sessions of supervised training over 3 weeks , participants were asked to independently perform HIIT or MICT for 30 min , 4 times/week for 5 weeks . Cardiometabolic outcomes included cardiorespiratory fitness ( VO2 peak ) , lipids , and inflammatory markers . Exercise enjoyment was measured by the vali date d Physical Activity Enjoyment Scale . Results : Exercise adherence ( 93.4 ± 3.1 % vs. 93.1 ± 3.7 % , respectively ) and mean enjoyment across the intervention ( 100.1 ± 4.3 vs. 100.3 ± 4.4 , respectively ) were high , with no differences between HIIT and MICT ( p > .05 ) . Similarly , enjoyment levels did not change over time in either group ( p > .05 ) . After training , HIIT exhibited a greater decrease in low-density lipoprotein cholesterol than MICT ( −0.66 mmol L−1 vs. −0.03 mmol L−1 , respectively ) and a greater increase in VO2 peak than MICT ( p < .05 , + 2.6 mL kg min−1 vs. + 0.4 mL kg min−1 , respectively ) . Interleukin-6 and C-reactive protein increased in HIIT ( + 0.5 pg mL−1 and + 31.4 nmol L−1 , respectively ) and decreased in MICT ( −0.6 pg mL−1 and −6.7 nmol L−1 , respectively , p < .05 ) . Conclusions : Our novel findings suggest that HIIT is enjoyable and has high unsupervised adherence rates in overweight and obese adults . However , HIIT may be associated with an increase in inflammation with short-term exercise in this population
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 ) .