Cancer less likely to develop in people that exercise

It's long been known that exercising can reduce the risk of cancer.

And now scientists believe they have found another reason why - and even say it could pave way for new treatments.

Those who stay fit are better able to process a by-product of running, jogging and pumping iron, research shows.

Lactate – which makes muscles stiffen after exercise – is a key driver of cancer growth and spread, experts claim.

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