That’s right, just 3 minutes! New research suggests that just three minutes of exercise a week (yes a week) could improve key health indicators. A workout regimen using High Intensity Training (HIT) consisting of just three 20 second bursts three times a week has been shown to be able to dramatically improve Insulin sensitivity and aerobic fitness, both key health indicators. The BBC’s Michael Mosley explore this and other surprising facts about fitness in this article and a Horizon programme – The Truth About Exercise.