“Getting out there and taking a walk is what it’s all about,” says James Levine, M.D., Ph.D., and a Mayo Clinic expert on obesity. “You don’t have to join a gym, you don’t have to check your pulse. You just have to switch off the TV, get off the sofa and go for a walk.”

The health benefit associated with walking is the subject of Dr. Levine’s editorial in the July issue of Mayo Clinic Proceedings. Dr. Levine’s piece is entitled, “Exercise: A Walk in the Park?” and accompanies a Proceedings article that showcases the merits of walking as beneficial exercise.

The study, undertaken by physicians from the Shinshu University Graduate School of Medicine in Matsumoto, Japan, determined that high-intensity interval walking may protect against high blood pressure and decreased muscle strength among older people.

Over five months, the Japanese researchers studied 246 adults who engaged in either no walking or moderate to high-intensity walking. The group who engaged in high-intensity walking experienced the most significant improvement in their health, the researchers found.

In his editorial, Dr. Levine says the study lends credence to the notion that walking is a legitimate, worthy mode of exercise for all people. Dr. Levine says it’s a welcome message for his patients, who fight obesity and appreciate that a walk is one way to improve their health.

Unlike a health club membership or personal trainer, walking “is there for everyone,” Dr. Levine says. “Walking doesn’t cost you anything, you can do it barefoot and you can do it now, this minute.”

“Sitting is bad for cholesterol, it’s bad for your back and muscles,” Dr. Levine says. “It’s such a terrible thing for our bodies to do and the less of it you do, the better. But activity is not easy. If it were easy, everyone would do it.”