<human>: For a little bit of background:  I've always hated running.  Until recently, the most I have ever ran was a mile.  However, a few weeks ago I started running with a friend and fell in love with it for some reason.  It's really important to me now and I want to make sure I can do it correctly and keep doing it.

I'm having a couple of problems though.  After my third run (we run 3.1 miles because my goal is to do a 5k eventually) I started to get pains in the back of my calves.  I have been to a running store and had them film me running and help me with picking out shoes and support.  I currently have a pair of Brooks, but I can't remember which one and I'm not at home right now so I can't see what they are.  These are the best shoes I have ever ran in, they are very light but seem to give me the perfect support when I run.  Before them I used to get a lot of pain in my knees and ankle, but that doesn't happen anymore.

I took a few days off for the pain.  We had been running 3 times a week.  Last night was my first time returning to the run and I could only make it a mile before I started to get pain in my calves again, but this time on the sides of my legs that are on the inside portion of my leg.  The previous pain in the back wasn't there any longer.  I'm wondering if I was just out of shape and my muscles are getting used to being worked or if something else may be up.  Also, I'm not sure if it may just be my running style.  Honestly, I don't know how I run.  I don't understand the different types of running very well and I don't really pay attention to what I'm doing because I don't know what I should be looking for.

To describe the pain a little more, it's like my muscles are very tight as if they are being flexed on their own and won't relax.  Any advice anyone could give would be great.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My calves use to hurt in the back, now they hurt on the sides without changing anything.  I went from running to 3.1m to 1m because the pain has gotten so great