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Massage is promising for muscle recovery

McMaster researchers find 10 minutes reduces inflammation

Researchers at McMaster University have discovered a brief 10-minute massage helps reduce inflammation in muscle.

As a non-drug therapy, massage holds the potential to help not just bone-weary athletes but those with inflammation-related chronic conditions, such as arthritis or muscular dystrophy, says Justin Crane, a doctoral student in the Department of Kinesiology at McMaster.

While massage is well accepted as a therapy for relieving muscle tension and pain, the researchers delved deeper to find it also triggers biochemical sensors that can send inflammation-reducing signals to muscle cells.

In addition, massage signals muscle to build more mitochondria, the power centres of cells which play an important role in healing.

"The main thing, and what is novel about our study, is that no one has ever looked inside the muscle to see what is happening with massage, no one looked at the biochemical effects or what might be going on in the muscle itself," said Crane.

"We have shown the muscle senses that it is being stretched and this appears to reduce the cells' inflammatory response," he said. "As a consequence, massage may be beneficial for recovery from injury."

Crane said the McMaster researchers are the first to take a manual therapy, like massage, and test the effect using a muscle biopsy to show massage reduces inflammation, an underlying factor in many chronic diseases.

The research appears in the Feb. 1 issue of Science Translational Medicine.

For their study, the researchers followed 11 men in their twenties.

On their first visit, the men's exercise capacity was assessed. Two weeks later, the men cycled on a bicycle for more than 70 minutes, to a point of exhaustion when they couldn't cycle any more. They then rested for 10 minutes.

While resting, a massage therapist lightly applied massage oil to both legs, and then performed massage for 10 minutes on one leg using a variety of techniques commonly used in rehabilitation.

Muscle biopsies were done on both legs (quadriceps) and repeated 2.5 hours later. Researchers found reduced inflammation in the massaged leg.

Crane admits being surprised that just 10 minutes of massage had such a profound effect. "I didn't think that little bit of massage could produce that remarkable of a change, especially since the exercise was so robust. Seventy minutes of exercise compared to 10 of massage, it is clearly potent." The results hint that massage therapy blunts muscle pain by the same biological mechanisms as most pain medications and could be an effective alternative.

Dr. Mark Tarnopolsky, professor of medicine for the Michael G. DeGroote School of Medicine, oversaw the study.

"Given that mitochondrial dysfunction is associated with muscle atrophy and other processes such as insulin resistance, any therapy that can improve mitochondrial function may be beneficial," he said.

Crane said this study is only a first step in determining the best therapies for promoting recovery from a variety of muscle injuries.

He said that surprisingly the research proved one oft-repeated idea false: massage did not help clear lactic acid from tired muscles.

A photo of Justin Crane can be downloaded at:

For further information and to arrange interviews, please contact:

Veronica McGuire
Media Relations
Faculty of Health Sciences
McMaster University
905-525-9140, ext. 22169

Veronica McGuire | EurekAlert!
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