Read the abstract below and please tell me what you think.

1) Do you agree with the author? 2) What is the weakness of the study? It might be their writing, results, sample, sample size etc..

Abstract Purpose Sprint interval training (SIT) has gained popularity as a time-effective alternative to moderate-intensity endurance training (END). However, whether SIT is equally effective for decreasing cardiometabolic risk factors remains debatable, as many beneficial effects of exercise are thought to be transient and, unlike END, SIT is not recommended daily. Therefore, in line with current exercise recommendations, we examined the ability of SIT and END to improve cardiometabolic health in overweight/obese males. Methods Twenty-three participants were randomized to perform 6 weeks of constant workload SIT (3d.wk , 4-6x30 s ~170%Wpeak, 2 min recovery, n=12) or END (5d.wk"], 30-40 min, ~60%Wpeak, n=11) on cycle ergometers. Aerobic capacity (VO2peak), body composition, blood pressure (BP), arterial stiffness, endothelial function, glucose and lipid tolerance, and free-living glycemic regulation were assessed pre- and post-training. Results Both END and SIT increased VO2peak (END ~15%, SIT ~5%) and glucose tolerance (~20%). However, only END decreased diastolic BP, abdominal fat, and improved post-prandial lipid tolerance, representing improvements in cardiovascular risk factors that did not occur following SIT. While SIT, but not END, increased endothelial function, arterial stiffness was not altered in either group. Indices of free-living glycemic regulation were improved following END and trended towards an improvement following SIT (p=0.06-0.09). However, glycemic control was better on exercise compared to rest days, highlighting the importance of exercise frequency. Furthermore, in an exploratory nature, favorable individual responses (VO2peak, BP, glucose tolerance, lipidemia, body fat) were more prevalent following END than low-frequency SIT. Conclusion As only high-frequency END improved BP and lipid tolerance, free-living glycemic regulation was better on days which participants exercised, and favorable individual responses were consistent following END, high-frequency END may favorably improve cardiometabolic health