The Backrest of the Office Chair is Very Hard

The backrest of the office chair is very hard, and the following methods can be used to improve it:

1. Use cushions/seat pads
   Choosing cushions or seat pads with sufficient support is a direct and effective method. The slow-rebound property of memory foam cushions can conform to the body's curves, evenly distributing pressure, especially suitable for lumbar support. Latex cushions combine elasticity and breathability, providing stable support. Down/plush cushions are soft but have weaker support and can be used as an auxiliary, avoiding being used alone as lumbar support.

2. Install thickened chair covers
   Fitting the chair with an integrated thickened or plush chair cover can quickly enhance the softness of the backrest, and it is easy to install and clean. However, note that if the seat has a built-in heating function, an overly thick chair cover can obstruct heat transfer and increase energy consumption. For car seats, confirm whether the chair cover affects the deployment of side airbags to ensure safety.

3. Scientifically adjust adjustable chairs
   If the chair supports adjustment, optimize it from three aspects:

• Seat height: Adjust it so that both feet are flat on the ground, with the thighs and calves at a 90-degree angle, and leave a fist-sized distance between the back of the knees and the edge of the seat pad to avoid leg suspension or compression.
• Backrest angle: Recline to 100-110 degrees to increase the contact area with the back, disperse pressure, and ensure no sense of suspension in the waist.
• Lumbar support adjustment: If the chair is equipped with adjustable lumbar support, move it up and down, forward and backward to the physiological lordosis of the lumbar spine to provide precise support and avoid waist fatigue.

4. DIY soft-pack modification of hard chairs
   For non-adjustable hardwood chairs, you can perform a soft-pack modification yourself:

• Material preparation: 3-5 cm high-density foam (strong support), wear-resistant fabric, a staple gun, or elastic bands.
• Operation steps: Measure the dimensions of the seat plate and backrest, cut the foam and chamfer the edges; wrap the foam with the fabric and fix it to the chair frame from the back. After modification, the cost is low (within 100 yuan), and the softness can be customized.

5. Use lumbar support seat pads
   Choose a lumbar support seat pad with a curved design. The lower seat pad guides the hips to sit back naturally, and the upper backrest fits the curve of the back, instantly providing lumbar support and stabilizing the hip angle, reducing the feeling of fatigue from prolonged sitting. Prioritize breathable materials (such as mesh fabric, 3D air layer) to avoid a hot and sticky feeling.