When it comes to exercise, if there was a way to get more health benefits by doing less, then it’s likely a lot of people would be interested. This is probably the reason that high-intensity interval training (HIIT) gets a lot of attention.
As new and exciting as HIIT might seem, it doesn’t challenge the fundamental assumption of sport science that if you do more exercise – regardless of what it is – you will get bigger improvements.
However, our latest research does challenge this assumption. We found that doing fewer high intensity sprints in a training session may actually enhance changes in cardiovascular fitness seen over several weeks of HIIT. And the lowest number of sprints that our study showed to be effective? Just two. [Read more…]