By Dr. Brian McDonough, Medical Editor

PHILADELPHIA (CBS) – I am a big fan of walking. It is not too tough on the joints and it can really help.

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Regular activity can help you reach a healthy weight, lower your blood pressure and improve cholesterol levels. The more active you are, the better the benefits.

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Research shows that even one hour a week is better for your health than doing nothing. You don’t have to slog through an hour-long sweat fest. Start with a 10-minute walk today. Every day, try to walk a little bit longer.

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And, if you are looking for the best choices in food this summer, the American Heart Association (AHA) recommends eating four to five servings of fruits and vegetables daily.