Short and sporadic bouts in the 2018 US physical activity guidelines: is high-intensity incidental physical activity the new HIIT?

Starting and sticking to an exercise programme is challenging for most who are at risk of developing lifestyle-related chronic disease: the most physically inactive, unfit, and overweight or obese middle-aged individuals, that is, the majority of the adult population. The 2018 US Physical Activity Guidelines for Americans1 introduced a number of new elements that will undoubtedly change how we think about and promote physical activity (PA). Not...