Fast. Exhausting. Miraculous? Every new combination of sets, reps and exercises has bold, occasionally insane, claims made about its effectiveness, but few have the scientific backing enjoyed by high-intensity resistance training – or, to give it its PR-friendly acronym, HIRT. Studies suggest it’s the holy grail of training protocols: one that lets you build muscle while burning fat, with minimal time in the gym. The downside? You have to do it exactly right – and you have to acknowledge that it’s going to, er, hurt. Still in? Read on.
First things first: if the name sounds familiar, you’re probably thinking of HIIT, or high-intensity interval training, the format you’ll see most modern gym classes follow. The difference, obviously, is the resistance part. These are full-body workouts, using low reps, heavy…
