Yes i have a slight case of anterior pelvic tilt which made my belly potrude even though im skinny and made my lower back hurt like crazy. I also had forward head posture from too much playing video games. Did you know you add an extra 10 lbs of pressure to your spine the more forward your head is? It’s like having a bowling ball near your body then sticking it out more and more it becomes more difficult to hold the weight even though the weight has stayed the same! So what i did was doing some hip thrusts because i have no glutes whatsoever and fixed my forward head posture (basically just keep my head in line with my body) and now my lower back does not hurt like it used to. Fixing anterior pelvic tilt helped out my lower back pain and potruding belly (i look skinny again) but it did not do much for erections and PE.