u/Bigmadmanwee

I know im slouching, but it’s impossible for me to hold my body straight, do you have any tip how to improve my form?

Theres something wrong how muscle is placed around my spine and scapula. On photos, you can see theres visible gaps and I can feel intensive pain in my back most of the day. Is there a way to fix it somehow? I tried a lot of different exercises already and recently I started doing yoga.