Short Answer:

The correct sitting posture at a desk keeps the body aligned, comfortable, and supported. Your back should be straight with the natural curve of the spine supported by a chair, and feet flat on the floor. Elbows should bend at about 90 degrees while typing or writing.

The monitor should be at eye level to prevent neck strain, and frequently used items should be within easy reach. Maintaining this posture reduces fatigue, prevents pain, and improves focus and productivity during long hours of work.

Detailed Explanation:

Correct Sitting Posture at a Desk

Back and Spine Alignment
Sit with your back straight and supported by the chair’s lumbar support. The spine should maintain its natural curve to avoid slouching. Avoid leaning forward or hunching over the desk, as this can cause long-term back and shoulder pain. Proper back support reduces strain and keeps the body comfortable for extended work periods.

Feet and Leg Position
Keep your feet flat on the floor or on a footrest if the chair is too high. Knees should be bent at about a 90-degree angle and aligned with your hips. Avoid crossing legs for long periods, as this can reduce blood circulation and cause discomfort. Proper leg positioning improves posture and reduces fatigue.

Elbow and Arm Position
Elbows should be close to the body and bent at roughly 90 degrees. Forearms should be parallel to the floor while typing or writing. Wrists should remain straight and not rest on the edge of the desk. Correct arm and wrist positioning prevent strain and repetitive stress injuries such as carpal tunnel syndrome.

Monitor Placement
The top of the monitor should be at eye level, about 20–30 inches away from your eyes. This prevents neck bending or craning, reducing neck and shoulder strain. Adjusting monitor height and distance ensures a neutral head position and reduces eye fatigue.

Desk and Work Surface
The desk should be at a comfortable height so that arms and shoulders stay relaxed. Keep frequently used items within easy reach to avoid stretching or twisting. A well-arranged workspace helps maintain correct posture and reduces unnecessary movement.

Breaks and Movement
Even with perfect posture, it is important to take short breaks and stretch regularly. Standing, stretching arms and legs, and walking around prevents stiffness and improves blood circulation. Regular movement complements correct sitting posture to maintain health and comfort.

Conclusion

The correct sitting posture at a desk involves straight back alignment, feet flat on the floor, elbows bent at 90 degrees, and monitor at eye level. Wrists and arms should remain relaxed, and frequently used items should be within reach. Maintaining this posture prevents strain, reduces fatigue, and improves focus and productivity. Combining proper posture with regular breaks creates a healthy, comfortable, and efficient workspace.