Not to argue with the article or any in the comments so far but here is my wisdom on this subject. People who may have injuries, imbalances or just poor skelet

Not to argue with the article or any in the comments so far but here is my wisdom on this subject. People who may have injuries, imbalances or just poor skeletal health are the ones who when they instantly take up a sport that is leg heavy at full load they end up with knee pain/damage. The point of visiting your doctor to make sure you are healthy enough to engage in an activity is good advice. I think form, distance and intensity are all important things to take into consideration. Bad form = potential for pain. Too much distance in a short time = potential for pain. Too intense = potential for pain. So having a good doctor and a good coach/trainer can help anyone taking on a new sport without injuries/pain.