[oh8eleven]

Running, especially jogging, is very hard on the joints.
It may be for a few, but for the vast majority of runners, there's no problem.
In fact, many studies have concluded that runners suffer no more bone and/or joint injuries than non-runners.
For example ...

[SampleMan]

Believe what you want. There will always be a study by an interested party to support you.

I’ve got to go with my own personal experience, where I’ve witnessed 30-50 year old runners getting impact injuries and destroying their ankles, knees, and hips.

Of course, not exercising at all leads to a weak joint support, and that also causes injuries and pain.

I’ll never believe that running 3 miles is better for a person than fast-walking it. As for running 5 miles or more a day? That’s just abusive on your body.