Hips and back\n\n Sitting causes your hip flexor muscles to shorten, which can lead to problems with your hip joints. Sitting for long periods can also cause problems with your back, especially if you consistently sit with poor posture or don't use an ergonomically designed chair or workstation.
Akathisia is a neuropsychiatric syndrome and movement disorder that makes it difficult to sit or remain still due to an inner restlessness. The name comes from the Greek word akathemi, which means inability to sit.
