@Zerorex. I have not run an officially timed race over 5k. I have been concentrating on that distance for the past two years. In daily runs, I have done 6 miles. I generally vary my running with some days around 4-5 miles, some days doing "sprints" of 800 meters x 4 or 5 with 2 in rest in between, and occasionally some hill running. I have never been a runner until age 56 so right now 5k seems like far enough to run. In fact, the mental aspect is still strong, with my body telling me I should quit around 2.5 miles into a race, but I have know the feeling is coming and I have to just push through it. I feel spent at the end of the race, so I can't imagine running any further. I suppose I will eventually try a 10k and figure out how to pace myself.
@Kflie83. Yes, we have all been there. When I first started running I had calf/knee/shin problems that occasionally sidelined me and made me question whether or not this was too much for me. You have to work through it. Give yourself some time to adjust. These ideas have been repeated over and over in this thread, but for me, here are the most important things:
1. Learn to run with proper form. Watch "Chi running" or "POSE running" videos and practice running with a mid-foot strike. Most injuries to calf/knee/shin come from striking the heel first. I had these problems in the beginning but once I learned the proper form, I no longer have them.
2. Get the right shoes. Have them fitted by a running professional. Start with a good basic running shoe that positions your foot properly. I still use basic running shoes. It did help me to try a minimalist shoe to learn proper form, but I do not like to run on asphalt with them. I practiced on grass until I learned the form. It took awhile and I am still working on it.
3. DO NOT go on a diet. You only set yourself up for failure. Instead, find a lifelong method of eating that works for your body. For example, Zone or Atkins are popular. I use the Paleo method (whole foods only, nothing processed, consisting of meat, vegetables, nuts and fruits only - no grains, dairy, sugar, or legumes/beans). I eat this way all the time, and do not miss other foods at all. There is a lot of information about the Paleo method online, and tons of delicious recipes. For example how about paleo muffins made from almond flour, apples, walnuts and coconut oil and a little honey?
4. Don't stop. If you can't run, walk. If you can't walk, ride a stationary bike. If you can't do that, swim. If you can't swim, do stretching. If your knees hurt, work out your upper body with pushups or dumbells. Do situps. Once you are up off the couch starting the c25k, don't sit back down again. Stay up.
5. Set a goal. I set a goal to run a 5k under 26 minutes six months ago. Now I am re-setting my goal to under 25 minutes by Jan 2013. Check around and find a 5k run somewhere near you in the near future. Check at your local running store or online. Commit to doing it. It does not matter if you walk the whole thing. Just go do it. In the race I just ran, people were still coming across the finish line in over 1 hour. And people on the side were cheering for them as much as the winners - in fact I would say even more! After I finished I walked over to cheer for others because I was just like them not that long ago. It does not matter what you weigh or what your time is - you are faster than the person still sitting on the couch. You may even meet someone you can run with at a local event.
You've probably heard all this before and I don't know if any of this helps, but it's kept me going.
Thanks to Wideguy for all you do here to encourage others!
Steve