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I was watching a program late last night on Channel 5 about health and exercise (I can't remember the name of the program but it had a number in it because it was one of those top x countdown shows). They were rubbishing lots of things, for example fitness trainers with no real qualifications and sports drinks, which are no real big worries but then they talked about the damage you can do to your knees by running. Relatively quickly you can make your knees look like they've had many years more wear, which is a concern, if there is real evidence/truth behind this. I enjoy my running (which I only took up 2 years ago at the relatively old age of 45) and wouldn't want to stop as I know I wouldn't enjoy other forms of exercise, such as cycling. swimming or going to the gym, as much. But I could try to avoid tarmac more and combine my preparations for races with other cardio-vascular exercising if it means I spare my knees more and future trouble with them.
Any thoughts from the community of runners out there?