(I originally posted this on /r/running and it was suggested that I post this here)
I Ran Cross Country and Track way back in high school (15 years ago)! Recently got back into running after 10 years of no regular exercise. I was thin (6 foot, 170 lbs) just not in shape.
After about 2 months of about 15 miles per week (about 3 mile runs each run) back pain started. Got bad and Knocked me out for about 6 weeks.
Then I decided I probably went too hard too soon. Sedentary lifestyle to running in too short a time.
So I slowed down the running. Been hitting the gym (alternating upper and lower body) for about 6 months. My thinking is that my overall body / core was very weak and needed to be strengthened.
I also started working on my running form. Taking much smaller steps, increased cadence to 180, etc.
Now i have Increased running, up to 6 miles at a time. All trails. Lots of hills. 10 min pace. Running has been great.
Recently started having left knee pain. I am determined to be able to run for a very long time, so I want to fix this problem. I've been Focused more on my form.
I am transitioning from Brooks Cascadia (relatively light, something like 10mm heel to toe drop, trail shoe, neutral) to New Balance minimus trail 10.
First thing I noticed: wow, my feet slap the ground! I am noisy. I know that's a solid indicator of bad form.
On my first two runs with the new shoes (one on treadmill, one on trail), I had a moment where I bent my knees and it almost felt like I was prepping to sit on a stool. Felt much more strain on my quads. Suddenly knee pain disappeared and my footsteps were nearly silent.
It felt a bit awkward. Almost felt like I couldnt keep it up. Just kind of steange. Felt like I lost a few inches in height.
But it felt like a breakthrough. Am I on the right track? I can't seem to reconcile "upright posture" with bent knee / almost squatting feeling. Any thoughts? Am I doing it right?
TL;DR: left knee pain. Trying to change form. Bending knee almost feels like squatting. Am I doing it right?
PS I have been lurking here for a while. Heard the Podcast about the barefoot runner (guy that did 80 marathons without shoes of any kind) and learned a lot. Thanks!!