Most 'HIIT' Workouts Aren't Really HIIT
by Beth Skwarecki on Vitals, shared by Beth Skwarecki from Lifehacker on (#5EYKW)
High intensity interval training made headlines in the 2010s with one specific claim: that short bursts of hard work can give the same aerobic benefits as longer sessions of jogging or cycling. But the HIIT videos you can stream today have very little to do with the original model, and many of them aren't worth your...