This is just one of many options that might help solve the issue. In reality 90% of people don't. Most just do a few warm up sets and begin their workout. There is nothing wrong with both options. If the problem started at 255 back off that weight for a bit. Deload and build yourself back up.
Try cutting down to 190lbs and add the Dynamic Warmup for a change and work your way back up see if that helps (just a suggestion)
I've really noticed that a lot more females are in APT than men. When I notice a female with great looking a$$ I normally out of habit attribute it to a severe case of APT before investigating further.
I have APT as well, It's def something you need to work with very hard to undo unless you're willing to change up a lot of lifestyle habits (NEVER!!!)
What's with the tone?
9 out of 10 threads on this site go to hell because of guys like you. Leave the emotion out of your response don't take the thread so seriously. I'd give you a hug but I don't think you're attracted to men (Hallowed care to spare a hug?)
This is exactly where we didn't want to thread to go, I don't want to play the "I'm right, you're wrong game" The OP is looking for a solution we are all offering advice.
If you'd like a response (Not getting overly technical) The Psoas major originates partially on the discs of the lumbar vertebrae as well as T12. Although other muscles are involved in Hip Flexion the Psoas major along with the Iliacus act as prime moves of hip flexion. Any time the hip of flexed they are active (hence when someone can't get deep on the squat often times its do to tight hip flexors or poor core stabilization)
Because the Psoas is attached to T12 to L5 when hip flexion is is taking place the lower lumbar spine is flexed. This isn't much of a problem for most people but for those with bad backs or issues with the hip flexsor this can be a minor problem.
I can go on from here and talk about how anterior pelvic tilt comes into play etc etc but I rather not turn a simple question into some form of Pseudo science.
The key thing to take away from this is, this isn't the end all be all, every "body" is different. Which is why we are offering many different solutions.
Ps. I wasn't trying to attack you, being passionate is great but there is a time and place for it.
One more thing, it was nice of you to start up another thread to continue the talk but my schedule consists of eating, sleeping, eating some more, work,working out, eating again and "free time" so I tend to not have time to post and follow threads maybe others will start and I'll just read along when I find the time.