Everyone on the Shape team worked her butt off (literally) to bring you this prized list. We huffed and we puffed, and our limbs were wobbly across the weeks to build this list. Reason: we were determined to suss out the most hard-hitting, high-intensity workout classes that give you the most bang for your weight loss buck. Our criteria were straightforward – the classes should get our hearts racing and our muscles slaving. After all, fat burn only starts to happen at around 70 to 80 per cent of your maximum heart rate. Strength training workouts were also on our radar since building muscle mass helps to increase metabolic rate. Ready to sweat your calories away? Read on now!
Photo: Uppercut Boxing