shortsighted businessman bad sitting posture at laptop

activity adjustable armrests back bad business businessman busy caster casual computer corporate design desk desktop employee environment ergonomic ergonomics eyeglasses factors focused furniture good habit headrest hours human hunched improper incorrect industrial laptop lifestyle long man mobility neck notebook office one pain performance position posture productivity profession professional real safety seat seated shortsighted space strain system table tension text therapeutic tilt typing wheelchair wheels working workstation writing wrong young over bent