I wore a weighted vest for a month. They're the latest fitness craze and I was sceptical... but this is how much weight I lost and the incredible impact it had on my heart health, cholesterol and even old injuries

Everyone from the postman to my hairdresser did a double take at first. Fitted around the chest with criss-cross straps, it resembles a bulletproof vest - or, more worryingly, an explosive device.

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