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Their requirement for exercise was over two and half hours / week of "moderate to vigorous physical activity" which I guess is running or similar.

I suspect that alone disqualified a good chunk of people.

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IIRC a brisk walk (faster than natural walking pace, but certainly not a jog) qualifies as moderate exercise in many studies. If that is so here then 2.5 hours is not nearly as difficult to achieve as you might otherwise think. Caveat: I've not read the report so I don't know if they explicitly define what they mean by "moderate".

It's a shame really. 2.5hrs a week isn't a huge commitment, especially if you're able to work it into your day, e.g. commuting to work.

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