SIT HAPPENS

An ergonomic kneeling chair is a practical and stylish solution for anyone who spends long hours working at a desk.

- Shane Mitchell

Inspired by the Variable Balans design from the 1970s, this chair promotes better posture and strengthens core muscles while adding a dynamic, rocking motion to your seating experience.

This project uses ash wood for its durability and aesthetic appeal, complemented by 75mm thick, highdensity foam cushions on the seat and shin rests. However, you can opt for plywood or other hardwoods if you prefer. The angled seat and rocking feature ensure maximum comfort, making it a rewarding build for DIY enthusiasts.

Not only does the chair look intriguing, but it also provides numerous ergonomic benefits. Regular use can improve posture, reduce back pain, and help develop a stronger core. Be mindful that transitioning to a kneeling chair takes time, particularly if you're new to this seating style, but the long-term benefits are well worth the adjustment.

Here's a detailed guide to help you craft your own kneeling chair.

What you will need

The materials and tools required include hardwood or plywood for the chair frame (I used 50mm thick ash for its cost-effectiveness and durability), 19mm plywood for the seat and shin rests, and basic woodworking tools like a table saw, bandsaw, and router. Highdensity foam, fabric, and batting are used for upholstery. Make sure you also have clamps, wood glue,spray adhesive, and a staple gun for assembly and finishing.

Supplies:
● wood: Hardwood or plywood [l used 50mm ash)
● 19mm plywood (for the seat and shin rests)

Tools and materials:
● Table saw
● Bandsaw
● Jointerlplaner
● Domino joiner/dowels
● Wood glue
● Router (with spiral up-down bit and 6mm round-over bit)
● Sandpaper and sander
● Clamps
● Penetrating oil (for finishing)
● High-density foam (75mm thick)
● Fabric and batting
● Rotary blade/scissors
● Spray adhesive
● Staple gun
● Sewing machine

Step-by-step guide