Forget Zumba - here's our guide to the fitness classes that are going to be huge this year.
1. Fierce
This new class is inspired by the dances and rhythms of Africa, so think lots of swinging, stamping, kicking, jumping and twisting, for a great cardio and toning workout. Virgin Active
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2. aquAllure
Aqua spinning is making waves in the US, and aquAllure is London’s first foray into the trend. It’s stationary cycling underwater, and you can burn 800 calories in one 45-minute session. Dolphin Square’s Health & Fitness Club, London

3. Orangetheory
Another class that has become a huge sensation over the pond, Orangetheory involves short bursts of cardiovascular and strength training, using a variety of equipment, including treadmills, rowing machines, suspension training and free weights. Selected David Lloyd studios

4. Hiit
Hiit (High-intensity interval-training) involves short bursts of high-intensity exercise, followed by a short period of rest or recovery. Each session only lasts 20 to 30 minutes, so this class is perfect for those who need to workout hard and fast. LA fitness

5. Sandbells
The sandbell – a squidgy weight filled with sand – has become hot property in America, so prepare for it to take the UK by storm in 2014. This class takes you through different stages of exercises with three different sandbells for a great endurance workout that should leave your muscles looking lean, not bulky. Fitness First

Introducing the gym wear that’ll make you run faster and stretch harder