Did you know that running for one mile is exactly 1,500 reps (or steps) of a one-legged plyometric exercise. Ask any fitness professional and they would tell you that plyometrics are an advanced exercise, that shouldn't be used until someone has built up their strength.
In the words of Mike Boyle, "Running produces forces in the area of two to five times body weight per foot contact." So, now we are talking about 1,500 reps, with a load of two to five times your body weight. Sounds advanced.
So, when did running become the starting point for someone who wants to get in shape? Running is an extremely advanced exercise. Yet most people who decide to start an exercise program start running from day one.
I don't necessarily want to convince you not to run, but I want to make people aware that it's an advanced exercise. It isn't for beginning, out of shape people trying to get fit. For those individuals, there are better choices.
Before you lace up your shoes, to head out for a run, the next nice day ask yourself, are you running to get fit, or are you fit to run?