By newscientist |

No sweat: Can I tailor my exercise to burn more fat?

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Martin Parr/Magnum Photos

By Andy Coghlan and Catherine de Lange

It seems logical. The way to kick-start your journey to a fitter, healthier and – let’s face it – more toned version of your post-holiday self is to work out until you are dripping in sweat. Finishing a workout drenched certainly feels like you’ve achieved something. And some people are even cashing in on this idea with gym kit that makes you sweat more during your workout and, supposedly, lose more weight too.

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But feelings can be deceptive. “Sweat is not a guide that can signal benefit as a result of exercise,” says Stuart Phillips at McMaster University in Ontario, Canada. “It’s an indication of your physiological need to dissipate heat load. When you sit in a sauna you sweat, but