'Now, double time your hips and booty!' This isn't the kind of thing my regular yoga teacher says to me when I'm down in my chaturanga, but that's what Buti Yoga is all about - breaking the mould. Described as a high intensity workout which fuses power yoga and tribal dance, the hour long session focusses on training the core using the Spiral Structure technique (basically, moving your torso in a circular motion) and thanks to H&M, we got to try it before viewing their new summer collection.

The session starts with Kapalabhati (short, forceful breaths in and out) to the rythm of tribal music, before launching into Rihanna tracks, teamed with full circular body swoops while sitting cross-legged on the floor.  A few giggles errupted when we started to pop our chests back and forth, but once I was in plank position shaking what my mumma gave me, my inner Beyonce joined the class. For the rest of it, I felt like a female warrior or dance video extra.  

I'm not going to lie, it's a bit hard to take it seriously at the start (thankfully we had H&M's campaign video playing in the background to keep us motivated), but if you give it a chance and leave your inhibitions at the door, you'll work up a hardcore sweat. In fact, I ended up sweating as much as I would in a spin class. Who knew yoga could be so cardio heavy? 

What You Need: Typical yoga kit, everything is done barefoot.

Difficulty Rating: 3/5 - the shaking and jumping will get your heart rate up and the yoga poses can be quite advanced depending on your teacher.

Location: Gymbox - Westfield Stratford: Mondays at 1.00pm, Westfield London: Mondays at 1:15pm and Wednesdays at 6:15pm, Farringdon: Tuesdays at 12:15pm, Bank: Tuesdays at 7.00pm, Covent Garden: Wednesdays at 7.00pm, Old Street: Fridays at 5:30pm.

How do I book? You have to be a member to take regular classes at Gymbox, but you can purchase a guest pass for £20 and book in to attend the class on the day.