Alora Griffiths on Unsplash" />Two kettlebells on running track.

TikTok users have been taking part in a ‘kettlebell challenge’, which involves swinging a kettlebell 100 times a day – the focus is to lose belly fat as well as improve overall fitness and strength.

Men’s Health suggests the challenge can improve “cardiovascular fitness, power development and also has the potential to increase muscle mass”.

You could do 50 swings in the morning, and 50 at night, or just plough through 100 in one go. The idea is you do it every day for 30 days.

While users have been sharing their before and after journeys, usually with impressive results, experts warn that it may not be the best choice for everybody and that in some cases, it could even be harmful.

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