Feels like the place to ask. At the moment I feel broken! I suffer from a bad back and have for ages, not so much now but still on some occasions when I stand at the sink doing washing up my lower back aches. About 3 weeks ago I was challenged to do this push up, arms out flat in front and try to push up, in doing so I over extended and I both felt and heard crunching/cracking in my back. Hurt at the time and I am still getting some pain there. Feels almost bruised about 1/4 of the way up my back.
My back pain started with my job at Honda, I was working on chassis which meant I was under the car for my entire shift and I was on the same job for about 9 months, no rotation of jobs like I was meant to get every break. With my hard hat on I was slightly to tall to be under the car and for duration of my task was leaning backwards. 9 months solid of doing this for about 7+ hours a day it appears to have really screwed with my back. I do have tight hamstrings and a slight tilt in the pelvis which doesn't help but after every gym session I make sure to stretch out well now.
Any idea what I may have done to my back? I am a postman now so spend a few hours a day walking with a bag over my shoulder and I can feel it at times, back just turns into one giant dull ache and gets quite uncomfortable. What are the chances I have cracked something? It certainly sounded like I did at the time.
I also really need to sort my shoulders out as they are pretty terrible with regards to mobility, I tried doing that test where you put one arm behind your back and one over the top and try to join fingers, can't even get close on one side! I do some door jams to try and loosen up my pec area, I do shoulder stretches like arm behind back and holding onto a frame/bar to stretch out my front delt area. Also do some resistance band work working exterior rotations.
Sorry for the long post.