Sitting stool Topstar Sitness 40 ST290W50 with backrest, black cover

The Topstar Sitness 40 ST290W50 with backrest and black cover is a compact sitting stool engineered for active sitting. Designed to encourage dynamic posture changes and core muscle engagement, this swivel stool suits short-term seating, meetings and tasks that require mobility and quick position shifts. Its small footprint and integrated back support offer a balance between freedom of movement and light lumbar assistance, making it appropriate for home offices, reception areas and counters.

Advantages

The Sitness 40 combines a flexible seat mechanism with a stable base to promote micro-movements while seated, helping to reduce static tension in the lower back. The integrated backrest provides additional support without restricting mobility, and the black cover gives a neutral, professional appearance that integrates into a variety of interiors. The stool is easy to move around thanks to its swivel function and compact design.

Suitable for

• Short-term sitting in home offices and shared workspaces
• Meetings, standing desk alternation and quick task changes
• Reception areas, counters and collaborative zones
• Users seeking increased core activation and posture variation

Key specifications

• Type: Swivel sitting stool with backrest
• Seating concept: Active/sitness seating that allows dynamic movement
• Upholstery: Black fabric or cover finish
• Support: Integrated low back support for light lumbar assistance
• Mobility: 360° swivel for easy orientation changes
• Design: Compact footprint suitable for small spaces and counters

How to use

Adjust the stool into an upright position and place it close enough to your workspace to allow relaxed arm positioning. Sit with your feet flat on the floor and use the swivel to change orientation instead of twisting the torso. Allow natural micro-movements by leaning slightly forward, backward or to the sides as comfort requires; the seat mechanism supports this dynamic activity. Use the backrest for light lumbar support when needed, and stand up regularly to alternate load and promote circulation.

Usage recommendations

For best results, alternate between the Sitness 40 and a conventional ergonomic chair during long work sessions. Maintain an active posture, take regular short breaks to walk or stretch, and position the stool so your forearms rest comfortably on the work surface to reduce shoulder strain.