If a pill could significantly lower the risk of heart attack, diabetes, stroke, osteoporosis and breast and colon cancer while reducing weight, cholesterol levels, constipation, depression and impotence and also increase muscle mass, flatten the belly and reshape the thighs even as it reduced the risk of age-related dementia and made you better-looking — and had no negative side effects — there would be panic in the streets. The American economy would tip into chaos. The military would have to be called in to secure supplies of the medication.
Luckily, there is no such pill.
But a large and growing body of credible research demonstrates that taking a good walk most days of the week can deliver all of the health benefits cited above and more (although we admit the “better-looking” part is harder to prove).
Yes, walking. You know: one foot in front of the other, repeat, rinse, repeat…
…[Early] in your walk your adrenal glands begin secreting adrenaline, which gets into your bloodstream and signals your heart to beat faster and causes your blood pressure to go up. The heart then begins to pump more blood away from the chest and into the muscles of the limbs you’re using to get yourself down the street. As a result, blood vessels in the arms and legs begin to expand as they’re fed more nutrients and oxygen by the blood.
As your heart rate climbs, you’re taking more breaths per minute, sometimes increasing your oxygen intake to 10 times the amount you’d be taking in if you were sitting still. As the muscles receive more blood, they begin to use up carbohydrates and sugar starches they’ve stored. Metabolism — the process by which the body breaks down materials and converts them to fuel — speeds up. As a result, so does digestion.
All this activity causes the brain to release endorphins into the bloodstream. Endorphins, which have chemical properties similar to opium, are responsible for blocking pain and ushering in that cozy sense of well-being you feel as soon as your walk ends. Additionally, exercise causes the brain to release an abundance of the neurotransmitter serotonin, which works to elevate mood.
And that’s all during the course of one walk. If you walk regularly, you can expect exponentially more benefits. [Redfearn]
Redfearn, Suz. “Take a Walk.” The Washington Post. 1 October 2002. <www.washingtonpost.com/ac2/wp-dyn/A17484-2002Sep28> (7 June 2004).