For many Gen Yers, taking a class at a boutique fitness studio is about more than health – it’s part of an entire lifestyle. New York-based Rumble taps into their desire for experiential exercise, offering boxing-themed group workouts in surroundings that replicate a club night out.

Boxing has already shaken up boutique fitness in the US, and it’s now arrived in London with KOBOX, which offers a non-contact version of the sport where people learn to throw punches and fight in a ring. Why are women swapping a slog on the treadmill for something a lot more powerful?

With energetic instructors broadcasting live workouts and a social community that motivates users to exercise often, Peloton bridges the gap between boutique studios and the growing home fitness market. But why are people opting for virtual, on-demand spin classes over a visit to their local gym?

Americans are now looking to the cold for its calorie-burning and health benefits. But can plunging temperatures really improve a workout? Manhattan-based Brrrn is attracting hot and bothered New Yorkers with its novel ‘refrigerated’ workouts based on science.