Take a rest from the computer… it is important

“The human body is always active while performing tasks at work. Even while seated, postural muscles are exerting tension to hold the mass of our upper body and head upright. Prolonged exertion can fatigue the muscles, which may lead to injury.
Improper workstation setup, along with certain processes, force people to maintain awkward postures and/or be exposed to compressive forces for long periods of time. Awkward postures and compression can impede the flow of blood, impinge nerves, and injure soft tissue.”

web.stanford.edu/dept/EHS/prod/general/ergo/microbreaks.html