Skyline Aqua

If you thought HIIT couldn’t get any harder, you couldn’t be more wrong. Skyline Aqua isn’t your usual interval training class – you’re required to put on swimwear before climbing on top of an AquaBase floating mat in a swimming pool. To stay balanced, you need to activate the usually unworked intricate stabilisation muscles in your body. Needless to say, you might end up falling into the water. But it’s worth the risk.