Ключевые слова: ache, adjustable, after, at, back, backache, background, bad, befor, before, business, businessman, caucasian, chair, clean, computer, copy, desk, desktop, electric, employment, entrepreneur, good, height, job, keyboard, male, man, men, office, pain, pc, posture, quarantine, relief, safe, save, sit, sitting, small, stand, standing, stress, the, using, with, without, work, young,