Another important feature is the seat and back tilt. Each should work independently of the other, allowing the person to adjust to the most comfortable body posture. Swivel mechanisms permit the trainee to easily switch positions during long meetings. Armrests should enable the trainee to rest their arms flat, creating a 90-degree angle at the elbow. This helps reduce fatigue to the upper body and temporarily takes pressure off the back.
Casters also add mobility and can save time and effort when reconfiguring the room.
The goal of task seating is to provide sufficient movement to relieve stiff and tense body parts without standing or stretching, which would disrupt the lesson. This does not eliminate the need for breaks, but it does allow them to be taken farther apart. Lecterns have been used since the early days of public speaking. There are two common types available today, floor and tabletop. The floor lectern is freestanding and usually accommodates lights and a sound system if required.