We observed secondary school students in Peru to see how posture changes with different classroom tasks. Forward leaning was by far the most common posture, especially while writing, where students often stayed bent over for long periods. Reading allowed more alternation, with arm support and relaxed postures providing short breaks. Listening to the teacher produced the most variety, combining upright and relaxed positions. These findings show that posture depends strongly on the task and suggest opportunities for better furniture design, posture awareness, and active breaks.
Galindo et al. (Fri,) studied this question.