Flick through your Instagram feed any day of the week and you’ll likely be presented with several images of topless guys. More often than not, those same guys have bodies that look like were chiselled by Gods themselves. But what you may also notice, is that they’re not the same steroid-induced muscular mountains – the likes of which were made popular by Arnold Schwarzenegger – but much leaner versions instead, with virtually no body fat to be seen.