India, July 25 -- Run for one kilometre. Ski Nordic-style for the next. Then, push a 100kg sled. Run some more. Row. Then, haul 30kg weights from A to B. Run again. Lunge with 10kg. Finally, throw a 5kg ball at a wall (and catch it) 100 times.

No, it's not a deleted scene from a Dwayne Johnson movie. It's Hyrox, a fitness competition that's been storming through gyms. Think of it as the matcha latte of workouts; the Dubai Chocolate of muscle-building. Hyrox (a mash-up of "hybrid" and "rockstar") seems a little masochistic. But as more and more people train like athletes these days, regular gymming has flexed upwards from Zumba to Pilates to CrossFit. More than 1,000 fans showed up for the Mumbai Hyrox debut in May.

"It's cool, and kind ...