Bignate, essentially right on all fronts, hence the reccomendation of a qualified examiner.
It all depends on the person & the movement (bodybuildiing vs. powerlifting vs. sportspecific etc.) , but from daily practical experience most people are tight in the hip flexors due to prolonged sitting & poor posture and exercise form - especailly women!
I find many guys train what they see in the mirror: Pecs, Ant. & lateral delts, bi's and rectus abdominus. They wear sweats and rarely do legs. - not saying any bro's here train this way, just what I obsserve daily
The goal of proper length-tension relationships will go a long in preventing injuries especailly in the low back. True neutral is virtually unheard of, but way too many people are anteriorly rotated. extreme muscle mass can skew tests thats why they need more of an independent assesment and individual muscle testing for strength and flexibility.
The ultimte goal should be effecient movement that is pain free with muscle and joints aligned to provide smooth, powerful movements.
All I'm saying while there will be some postural deviations due to amount of weight, lifting style & goals. The people I see are friggin clueless about correct from, functioning and athletic movements. They lift with their ego until they injure themselves and then they skip bodyparts, use girlie machines or quit all
together
Postural & muscle testing should enhance lifting, not prevent it but some people will need corrective exercises or they will develop chronic imbalances and injuries. Look around your gyms - how many people stand up straight?, how many dorks do curls in the power rack flexing their shoulders and hyperextending their back to get the weight up.
Guys can still train hard & heavy, just balance the muscles and stretch what is tight. Avoid the movements that can make your situation worse and use a proper ROM - lift with your muscles and not your ego
If you want to learn more about specific muscle & postural tests read "Muscels Testing & Function 4th Ed." by Kendall and Kendall
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