Here is a link to an article in the Denver Post which discusses how running may be protective to our joints. Here is a quote from the article responding to the idea that running causes wear and tear on joints.
No — if anything, running probably offers protection from osteoarthritis, says Paul Williams, an exercise scientist at Lawrence Berkeley National Laboratory who leads the National Runners' Health Study and the National Walkers' Health Study. These projects have enlisted almost 90,000 runners and walkers and followed them since the studies began, in 1991 and 1997, respectively. In an analysis recently published in the journal Medicine & Science in Sports & Exercise, Williams calculated rates of osteoarthritis and hip replacement among participants in his studies and found that runners were approximately half as likely as walkers to develop osteoarthritis or need a hip replacement. Furthermore, runners who ran the most had the lowest risk of osteoarthritis.
The notion that running causes osteoarthritis arises from a misperception about how joints work, says Alex Hutchinson, a science journalist who is author of the Sweat Science blog at Runner's World and the book "Which Comes First, Cardio or Weights? Fitness Myths, Training Truths, and Other Surprising Discoveries from the Science of Exercise." "People think the joint is just a static, inert hinge that wears down, but it's actually a dynamic, living thing that can respond to stress and adapt and get stronger," he says. Rather than wear down cartilage and other joint tissue, running appears to strengthen them, Hutchinson says.
Click on the link to read the entire very informative article.
http://www.denverpost.com/entertainment/ci_23852288/running-may-actually-protect-you-against-osteoarthritis
Looking together in the same direction.
Sea otters hold hands while they sleep so they don't drift apart.
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