This just in: Exercise is good for you

There are exercise guidelines, of course. One of the most widely quoted physical activity recommendations comes from the US government’s Office of Disease Prevention and Health Promotion that recommends everyone exercise at a moderate or greater intensity for at least 150 minutes a week (or 30 to 45 minutes most days of the week). While this may sound reasonable enough, most people don’t follow it. The reasons are many and diverse, but a common one is that physical activity is not part of the daily routine. For example, increasingly we do not rely on walking or biking to get to work.

Two studies, one message

Two recent studies looked at the impact of different types of physical activity and came to similar conclusions. The first study compared rates of heart disease, cancer, and premature death over a five year period among more than 260,000 people who walked to work, cycled to work, or were sedentary during their commute. Compared to those who were sedentary:

Those who biked had almost half the rate of heart disease, cancer, or premature death.

Those who walked had lower rates of heart disease (by 27%) and lower rates of death due to heart disease (by 36%).

The other study was one performed as a follow-up to previous research that linked running for as little as five minutes a day (on average) with a longer lifespan. Further analysis found that runners (as compared with non-runners)

experienced a 40% lower risk of premature death

lived an additional three years

were estimated to gain seven hours of added life for every hour they spent running.

In this study, the benefits of running were noted even for those who had cardiovascular risk factors, such as high blood pressure or smoking. Taken together, the researchers concluded that running might be unique in its health benefits among different types of exercise that have been studied. And while more running provided more health benefits, there did appear to be a limit: additional benefits were not seen with more than four hours of running per week, and three years of added life seemed to be the maximum gained. Cycling, walking, and other physical activity were also beneficial, though not as much as running.




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