Is sitting at a 90-degree angle good or bad?

The Optimal Seated Posture: Exploring the Health Benefits of a 135-Degree Angle

Maintaining a sedentary lifestyle, whether at work or at home, has become increasingly common in our modern society. Prolonged sitting can pose significant health risks, particularly for our musculoskeletal system. One critical aspect to consider when sitting for extended periods is the angle between our thighs and our bodies.

90-Degree Sitting: An Unnatural and Unhealthy Posture

Traditionally, it was believed that sitting at a 90-degree angle, with our thighs parallel to the floor, was the most appropriate posture. However, research has shown that this position puts undue stress on our lower backs. When we sit at 90 degrees, our hips are flexed and our weight is distributed unevenly on the back of our thighs. This can lead to pain, discomfort, and even back injuries over time.

135-Degree Sitting: A More Ergonomic and Healthier Option

Ergonomics, the science of designing workplaces to improve comfort and efficiency, recommends a more relaxed seated posture. A study conducted in 2018 found that sitting at a 135-degree angle, with our thighs at a slight incline, significantly reduces pressure on our lower backs. This position allows our hips to remain in a more natural position and better distributes our weight across our thighs and buttocks.

The benefits of sitting at a 135-degree angle include:

• Reduced pressure on the lower back, minimizing pain and discomfort
• Improved blood circulation in the legs
• Reduced risk of developing back injuries
• Increased comfort during prolonged sitting

Achieving the Optimal Seated Posture

To achieve the optimal 135-degree seated posture, consider the following tips:

• Use an ergonomic chair that provides adjustable seat height and lumbar support.
• Ensure your feet are flat on the floor or on a footrest.
• Adjust your chair so that your thighs are at a slight incline, approximately 135 degrees to your body.
• Use a back support cushion to support the natural curve of your lower back.

Conclusion

Maintaining a 90-degree sitting posture can negatively impact our health, causing lower back pain and discomfort. By adopting a more ergonomic and healthier 135-degree angle, we can reduce the strain on our lower backs and improve our overall well-being. It is essential to remember that the optimal seated posture varies from person to person, so adjusting your position to find what feels most comfortable is crucial. Consulting with a healthcare professional or ergonomist can provide personalized guidance for achieving the best seated posture for your individual needs.