You can do it!!!! I am currently 80 pounds over-weight...I started running in June of this year...well that is what I call it but really it is a slow jog! I have completed two 5K's and I am doing a 10 K this weekend! If I can do it, you can too!!! What helped me was when someone told me to SLOW DOWN! I was jogging too fast and I could only do 6-8 minutes then I would need to walk.....This is my advice, Get on a treadmill, walk at a nice pace. A pace where you are not walking for enjoyment but you are not breathing too hard either.. you can hold a conversation with someone as you are walking...now bump your speed up .3 Yes you read that right.... bump it up so you are going only .3 of a mile faster. Now pick up your knees and jog!!!!! See how long you can jog at this speed. The first time I did this I jogged for 38 minutes, the second 78 minutes!!!!! You will be amazed. At this point you need to get in some endurance, you can work on your speed later.
After doing this for a few weeks, I ran 1 mile outside and timed myself. (I do not think you can go by the distance on the treadmill as it never coresponds with real distance outside.) Be sure to try to run the same pace you were doing on the treadmill. This will give you an idea of your pace. I was jogging a 13 minute mile. My first 5K my goal was to run my race at my pace and to finish it without walking regardless of my speed...many people passed me! But I didn't walk! I did it in a just a bit longer than 13 minute miles. The second 5K I did I ran it in 12 min 25 sec miles! My goal this weekend is to run the whole 10K without walking..and I am not going to worry about my time!
I also challenged myself to a three hour jog/run on the treadmill.....I have done this twice! This was important for me to know, mentally, that I CAN run for three hours straight! If I can do that...What else can I do? Now I am working on doing that outside. My longest outside run without walking is currently 7 miles. I did that after coming off of a night shift with no sleep! Running really is 80% mental! Everytime you want to stop, challenge yourself to go three more drive ways, 1 more song, 1 more minute...whatever you can do! Then do it again!!!!
You can do it!!!!!!