I typically see:
tight hip flexors, hamstrings, calves
tightness through the external hip rotators, leading to restriction in hip joint range
limitation of lumbar spine extension
stiff thoracic spine
protracted and elevated scapulas with weak lower trapezius and serratus anterior
tight and weak posterior rotator cuff
poked chin posture with associated weak deep neck flexors and overactive upper trapezius, levator scapula and rhomboid muscles.
Prolonged sitting has also been linked to hamstring strains. The lumbar spine stiffness associated with sitting leads to altered neural input into the posterior thigh, the theory goes. This can manifest as increased muscle tone of the hamstrings, which will alter the length-tension relationship and increase the risk of strain.
Hunched postures cause thoracic spine stiffness, shoulder imbalance and winged scapulas.
Each of my clients is encouraged to correct their posture, perform a daily flexibility program and take a look at the ergonomics of their work-stations to help them regain the alignment and muscle balances that are essential for them to achieve their best health.