Long hours of sitting will also likely lead to your hip flexors becoming tight, since they are contracted for unnaturally long periods. Tight hips are a pain, and may well limit you in your workouts, shortening your range of motion. You can stretch them out in a number of lunge variations to ease the tension.
Tight hips can also make it harder for your glutes and hamstrings to fire up. This could lead to other muscles taking more load than they should, and could cause lower back injuries, for instance.
To improve your posture, be sure to incorporate exercises to stretch and strengthen glutes and hamstrings in your workout.
Having a desk job doesn’t necessarily mean long hours of terrible posture.
Innovators are continually developing new gadgets and gizmos to allow for good posture at a desk.
Ergonomic chairs, standing desks, treadmill desks, laptop stands. There are plenty of options for you to try.
Any one of these, or a combination, could end or at least significantly lessen your desk-job posture woes.
Working to improve your posture is well worth the effort. Standing taller and straighter boosts your confidence (think power-posing) and will keep your spine supported and happy.