Hi, i'm a certified massage therapist and due to my own interests I have continued studying on my own. I've quickly come to realize my education was pretty lacking when truly trying to understand how the body works. While studying on my own I've come into a few questions I can't seem to find a definitive answer for. Hopefully you can help.

1. With winging of the scapula caused by serratus anterior weakness does that automatically mean the rhomboids are in a shortened and strong position? I assume so because they're antagonistic muscles but yet when I read about Janda's Upper Crossed Syndrome i constantly see both serratus anterior and rhomboids described as being weak. I have the classic forward head, rounded shoulders hunched look, with winging of the scapula so in making up an exercise regimen I'm not sure if rhomboid exercises are indicated. For now i'm just doing a lot of mid and low trap activation exercise and leaving any rhomboids out. a PT i've gone to said rowing movements would be good to pull my back up straight. so i don't know at this point. I feel like my rhomboids are already overdeveloped.

2. Both my massage teacher and a chiropractor have told me a tight psoas can possibly pull your spine into flexion when standing. Everything i've read states it can only pull the low back into extension, that makes sense to me. So are there any circumstances in which a tight psoas could possibly pull the low back into a flexed position?

3. I constantly read the term Upper abdominals, mostly in reference to being tight and restricted. As far as i understand a shortened muscle has a constant pull throughout the entire muscle, meaning proximal end can't be any tighter than the distal end. Is this also the case with the rectus abdominous? do the segments of this muscle influence it differently then other muscles? I ask cause even on my own body it seems the upper abs attached to the ribs seem more compact then the lower part of the rectus abdominous. Perhaps this is caused by adhesions?

4. When a tight pec minor anteriorly tilts the scapula can it pull the inferior angle off of the rib cage? or will it only slide it up the rib cage and any subsequent winging is only the result of also having a weak serratus anterior?

5. Lombard's paradox states that 2 joint muscles can contract at the same time to perform a movement (or so i understand). Like how the rectus femoris will contract to extend the knee while the hamstrings simultaneously contract to extend the hip to go from a sitting to standing position. So if this co-contraction happens, is it possible for two antagonistic 2-joint muscles to become individually inflexible if the body is in poor postural alignment (say for instance someone stands with slight flexion in the knees and an anterior tilt.)Sorry about this one, it seems hard for me to explain myself, so either i'm completely misunderstanding or it's just complicated.

i hope this isn't too much. i've just been wondering about this things and haven't been able to find a good answer. Thank you for whatever you can answer for me.