Yes, according to researchers at McMaster University in Canada. A new study, published in the prestigious Proceedings of the National Academy of Sciences, demonstrates in laboratory mice that endurance exercise can effectively slow down the aging progress. By studying mice that have been genetically engineered to age faster due to mitochondria that cannot effectively repair themselves, scientists showed that mice that ran on a treadmill three times a week for five months prevented premature aging in nearly every organ of their body. It's been thought that part of the aging process involves defects in mitochondria, structures which provide the energy to power each of our cells. As we age, it's theorized that our mitochondria become less efficient, which results in a slow decline in bodily tissue and organ function. Said the lead author of the study, "I believe that we have very compelling evidence that clearly show that endurance exercise is a lifestyle approach that improves whole body mitochondrial function which is critical for reducing morbidity and mortality. Exercise truly is the fountain of youth." [via Medical News Today]
Here, the sedentary mouse (bottom) shows signs of premature aging, including balding, compared to the active mouse (above).
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