We all know that exercise is good for your health.
But, the other side of this equation is often overlooked: a lack of exercise, or physical inactivity, is a major health risk.One of the first landmark studies that recognized this fact was conducted more than 70 years ago.
In the 1950s, epidemiologist Jeremy Morris studied more than 30,000 employees of the London transportation system.
He observed that bus drivers who sat all day behind the wheel had a higher risk of developing coronary heart disease than conductors who walked up and down the aisles and stairs collecting fares.
This natural experiment fundamentally changed how we think about activity for the prevention of heart disease.Since then, the evidence to support physical activity for better cardiovascular health has grown substant…
المصدر: time
