Liz Hurley, Madonna and Chrissy Teigan are just a few of the stars who boast enviable physiques while juggling jam-packed social calendars with work commitments.
But while the star-studded line-up are likely to have top personal trainers and nutritionists on speed dial, there is one 'secret fitness weapon' that is keeping these celebrities in shape.
Electronic Muscle Stimulation, otherwise known as EMS, is a surefire way to get you in shape in no time, with the raved about technique allowing you to burn the same amount of calories in 20 minutes that you would in a 90-minute gym session.Two ok OK!'s lifestyle reporters decided to give it a go, with each going to a different company to sample the futuristic workout that is EMS.
Here's what they found... Get exclusive celebrity stories and fabulous photoshoots straight to your inbox with OK!'s daily newsletter Surge Fitness I headed to Surge Fitness in Hammersmith for my first taste of EMS which promised to have my muscles burning in just 20 minutes.
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