New HIIT protocol promises Zone 2 benefits in 8 minutes

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.