Physically demanding work was defined as work involving repetitive lifting, load-carrying or other significant physical exertion.

BBC: Heavy work 'bad for childbirth'

In 1960, half of the native-born men in the labor force were high school dropouts happy to do physically demanding, low-skilled work.

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Pregnant women whose job is physically demanding - or who do shift work - could face more childbirth problems, say scientists.

BBC: Heavy work 'bad for childbirth'

Social Security was designed to give a few years of modest benefits to people whose bodies were worn out through coal mining, factory work and other physically demanding labor.

FORBES

He said British farmers had turned to migrant labour because skilled British workers found they could "work lower numbers of hours for more money" in other industries and students were no longer prepared to do seasonal agricultural work, which could be physically demanding.

BBC: British workers 'needed on farms'

In physically demanding occupations, it is true, some may be unable to work into their late 60s.

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Obviously he's going to make me work hard and it's going to be a physically demanding fight but that's what all the preparation is for.

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