These muscles when tight are often implicated in causing musculoskeletal pain:
Lumbar muscles & hamstrings
Levator scapulae/upper trapezius
You have to learn how to stretch these muscles. Good flexibility improves posture, ergonomics and resolves pain. Our bodies have a tendency to allow certain muscles to tighten up and that affects our posture. This list of muscles show a tendency towards tightness and being overactive in movements.
I recommend static stretches for these muscles. Two reps of 30 second holds each.
For nutrition of tight muscles I recommend Metagenics Wellness Essential JOINT FOCUS (2 packets daily) and additional high doses of omega 3 fish oils. I usually suggest the Metagenics EPA-DHA 720’s.
Order at www.DrJeffreyTucker.meta-ehealth.com