A new trending workout seems to emerge every month. Each guarantees a happier, healthier, stronger and leaner you.

There’s a viral challenge, known as “75 Hard”, which promises to improve your mental toughness if you work out for 45 minutes twice a day – while also sticking to a diet and drinking a gallon (3.8 litres) of water daily, among other things. Another, known as 12-3-20 (not to be confused with 12-3-30 or 25-7-2), claims to transform your body. And there’s always some new kettlebell routine with thousands of TikTok views saying it can make you a faster runner almost immediately.