Men with less cash tended to do more physical labour so their jobs kept them fit and slimmer.

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And people on probation must seek work but can decline job offers, such as those requiring hard physical labour in the sweltering midsummer.

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Just 750 of the firm's 30, 000 infected South African employees now get treatment, but 97% of them are back in full-time work, including heavy-duty physical labour.

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Police officials say that complaints made by children at the shelter include forced labour and physical assault.

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In high income countries, physical activity dwindles as people use more technology and are less engaged in labour-intensive work.

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