The concept: First there was ashtanga flow yoga, then Bikram yoga (which the people behind Fierce Grace brought to the UK in 1994) – and now comes Fierce Grace to combine the best of the two. Don’t worry if the words ‘ashtanga’ and ‘Bikram’ mean nothing to you, though – this friendly new way to get bendy is equally good for beginners as seasoned yogi masters. Practised in a room heated to 35?C (5?C cooler than Bikram, but still more than enough to get you in a sweat), Fierce Grace mixes dynamic sun salutations and balances with deep stretching poses to burn calories, build strength AND boost flexibilty. Win, win, win, then.

What you need: Comfy, form-fitting gym gear (but be warned: wear full trousers in this heat at your peril), a big ol’ bottle of water and an open mind. Mats are provided, but you’ll need to bring or rent a towel to lay on top.

Difficulty rating: Tough. If you’re not used to hot yoga, the sauna-like conditions can be a shock, and some of the poses are challenging – balance on one leg while looking over your other shoulder, anyone? – but you’ll love how quickly you’ll see results, and you’ll come out feeling uplifted and energised (if very soggy).

Location: Studios in City, Kentish Town, Queen’s Park, Primrose Hill and East Finchley, London.

Cost: £12-15 per class

How do I book? Visit fiercegrace.com