[Joemoplata]

LOL @ how is doing high kicks bad for your legs!!!

If you were running everyday, you were putting a great deal of strain on your legs. It takes a while for your muscles to repair after working them out, these are big muscle groups and need time to heal. Let's look at what's happening between the two exercises (running vs kicking):

During running you are putting your legs under muscular endurance strain. You are asking them to work (neuromuscular response) under a very specific type of condition. Essentially, low to moderate contract repeatedly for a given period of time most likely in an aerobic state. While not as difficult as high level of contractions (explosive) in a short period of time, it still causes some damage to the muscle groups involved. This damage is usually seen as small tears to the fibers and connective tissue (tendons).

Kicking is an explosive contraction for a short period of time. You are asking your muscles for moderate to high contraction at it's greatest length (stretch). This is very difficult on the fibers under normal conditions, but stretching the fibers will allow more flexbility in preparation for the action in both the muscles and the connective tissues. This action is causing most of the strain at the connective area since the action is more stretch than contraction.

So....if you run in the morning and cause all this microscopic damage to your muscles and tendons, you are asking for some problems going and doing a lot of kicks later than day. You will be over stretching muscles and connective tissue that needed a bit more time to heal. You would need to be doing more stretching than the average person who wasn't running and doing the same kicking actions.

So it does makes sense that you now have some problems and yeah, to me the tendon scar tissue makes perfect sense.