Should legs be 90 degrees when sitting?

Optimal Sitting Posture: Avoiding 90-Degree Legs

Proper seating posture is essential for maintaining musculoskeletal health and preventing discomfort. While many people assume that a 90-degree angle between the thighs and the floor is ideal, research has shown that this position is far from optimal.

Why 90-Degree Legs Are Not Ideal

When sitting with legs at a 90-degree angle, the hips are compressed and the pelvis is tilted backward. This position restricts blood flow to the legs, putting pressure on the arteries and veins. Additionally, it increases stress on the lumbar spine and can lead to lower back pain.

Optimal Thigh Angle: 120-135 Degrees

Studies have found that the optimal seating position for the thighs is at an angle of 120-135 degrees. This angle allows for proper blood circulation, reduces pressure on the hips and spine, and promotes a more relaxed and comfortable posture.

Achieving the Optimal Angle

To achieve the optimal thigh angle, it is important to tilt the hips forward and slightly downward by about 20-30 degrees. This can be done by adjusting the chair height or using a chair wedge.

Chair Wedges

Chair wedges are small, angled cushions that can be placed on the seat of a chair to tilt the hips forward. They are particularly beneficial for people with short legs or who have difficulty maintaining the optimal thigh angle on their own.

Benefits of Optimal Sitting Posture

Maintaining an optimal thigh angle while sitting offers numerous benefits, including:

• Improved blood circulation
• Reduced pressure on the hips and spine
• Decreased risk of lower back pain
• Enhanced comfort and relaxation

By following these tips and achieving the optimal thigh angle, you can improve your overall sitting posture and promote musculoskeletal health.