Exercise Benefits — The Earliest Studies

In the late 1940โ€™s and early 1950โ€™s, British researchers compared drivers and conductors on Londonโ€™s double-decker buses.ย  ย Their demographics were virtually identical: men, same ages, from same backgrounds, same incomes, same amount of smoking and drinking โ€“ the only difference was the conductors walked up and down aisles and stairs all day, while the drivers sat.ย  And the drivers had lots more heart attacks!

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