The 135 degree angle sitting position seems popular these days but sometimes the chair you are sitting in can not recline.
So if you must sit in a non-reclining chair, is it better to sit upright on the edge of your seat with your knees bent at 45 degrees and maintain a hip angle of 135 degrees or to sit in a relaxed upright position using the back support at a relatively 90 degree hip angle?
It is better to sit with your entire back against the backrest. What angle to set the backrest to is a second order optimization, the ideal angle is not the same for everyone, and it if you sit for more than an hour at a time it is better to change the angle now and then than to leave it at any given angle.
The 135 degree angle sitting position seems popular these days but sometimes the chair you are sitting in can not recline.
So if you must sit in a non-reclining chair, is it better to sit upright on the edge of your seat with your knees bent at 45 degrees and maintain a hip angle of 135 degrees or to sit in a relaxed upright position using the back support at a relatively 90 degree hip angle?
It is better to sit with your entire back against the backrest. What angle to set the backrest to is a second order optimization, the ideal angle is not the same for everyone, and it if you sit for more than an hour at a time it is better to change the angle now and then than to leave it at any given angle.