A 2015 review of injuries in runners found that the knee was the predominant site of leg injuries in runners.
So you might think knee doctors strongly dislike running, but in reality the sport isn't all bad for knees.
In fact, running can be just fine for knees — so long as your training isn't solely logging miles.
"Most runners need to cross train, they can't just run," Dr. Sabrina Stickland, the co-director of the Patellofemoral Center at the Hospital for Special Surgery and an orthopedic surgeon told Business Insider.
That could be anything from yoga to weight training. Trading in a run for another form of cardio like swimming or cycling can help as well.