Many office professionals spend between 8 and 10 hours a day sitting at a desk. While sitting feels restful compared to standing, prolonged sitting places significant, continuous compression on the lumbar spine. Over time, poor seating habits can strain the ligaments and muscles that support the back.
The Impact of Prolonged Sitting on the Spine
When sitting, the natural forward curve of the lower back (lumbar lordosis) often flattens out, especially if we slouch. This slouched posture tilts the pelvis backward (posterior pelvic tilt), which increases the pressure inside the intervertebral discs. In fact, sitting with a slouched posture increases intradiscal pressure by up to 90% compared to standing.
What We Look For in an Assessment
When evaluating back pain related to desk work, a physiotherapist checks:
- Pelvic and Lumbar Posture: Whether you sit on your tailbone (slouching) or on your sit-bones (active posture).
- Hip Flexor Tightness: Prolonged sitting keeps hip muscles short, which can pull the pelvis forward when you eventually stand.
- Core Stability: The ability of your deep abdominal muscles to protect the spine during movement.
- Spinal Flexibility: Range of motion in bending, extending, and twisting.
Graded Mobility and Strength Exercises
To manage sitting-related back discomfort, therapy focuses on:
- Lumbar Extensions: Simple standing back bends to help counter forward slouching.
- Deep Core Activation: Graded transversus abdominis strengthening.
- Gluteal Activation: Exercises to wake up the buttocks, which support the lower back during standing.
- Frequent Movement Breaks: Moving for 2 minutes for every 30 to 45 minutes of desk work.
When to Seek Medical Care
Consult a physician immediately if your back pain is accompanied by:
- Shooting pain down both legs.
- Numbness or weakness in the legs or feet.
- Unexplained weight loss, fever, or night pain.
- Loss of bowel or bladder control.
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