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The remaining men began a typical moderate exercise program, cycling to the lab five times a week at a pace they could comfortably maintain for 30 to 40 minutes.
Over the next six weeks, the HIIT group pedaled intensely for a grand total of less than an hour, while the moderate intensity group worked for at least 2.5 hours per week during the same period.
At the end of the six weeks, both groups returned to the lab for a retest, after which the scientists combed their results to look for disparities. They found a lot.
The men were almost all in better shape, and about the same extent, regardless of how they exercised. But only those who exercised moderately lost a lot of body fat, improved their blood pressure, or became more adept at metabolizing the extra fat from the smooth shake.
Perhaps most interestingly, everyone’s blood sugar control at home was only better on the days they exercised – three times a week for the HIIT runners and five for the moderate group. The remaining days blood sugar tended to rise.
Taken together, the results indicate that traditional intervals and exercises change our bodies in divergent ways, and we might want to consider what we hope to achieve with exercise when choosing the best way to exercise. says Jamie Burr, a professor at the University of Guelph, who led the new study with his graduate student Heather Petrick and other colleagues.
“Any exercise is good,” says Dr. Burr. But “there are nuances”. Frequent, almost daily moderate exercise may be better for improving blood pressure and continued blood sugar control, compared to infrequent intervals, he says, while a little HIIT is likely to get you back in shape too. effectively than hours and hours of easier cycling or similar effort.
Of course, this study was small-scale and short-term and only involved overweight and deformed men, so we can’t be sure the results apply to the rest of us. But the main lesson seems broadly applicable. “Move often,” says Dr. Burr, meaning if you HIIT today, walk tomorrow and repeat.
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