New HIIT protocol promises Zone 2 benefits in 8 minutes
news · 2026-08-30 · Mindbodygreen
A new cardio workout strategy, developed by physiatrist Dr. Kelly Starrett and coach Brian MacKenzie, suggests short, intense intervals can mimic the metabolic advantages of longer Zone 2 training. The program involves 8-minute high-intensity sessions, aiming to improve mitochondrial function and fat oxidation. It's for people short on time who still want to tap into metabolic health gains.
Sabin's take. So, the internet is still fighting about Zone 2, but now there's a new challenger. This protocol from Starrett and MacKenzie basically says you can get the mitochondrial benefits – better cellular energy, more fat-burning potential – from just eight minutes of high-intensity intervals, three times a week. It’s a direct shot at the idea that you need hours in a low-intensity zone. For people with actual lives, this is good news. I've been doing more short, hard sprints lately; I was tired of feeling like I needed to be on a bike for an hour every day just to feel 'done.' This kind of training is about sending a strong signal to your body to adapt, fast. It’s also about hitting the central nervous system hard enough to trigger those changes, then letting it recover fully. The catch? You actually have to go *hard* for those 8 minutes. No coasting.
#fitness #recovery #longevity #metabolism #nervous-system #nutrition