Occasionally sit, reach at overhead, shoulder, knee, floor; bend, stoop, squat, crouch, kneel, crawl, climb stairs / ladders, twist, push / pull with arms; be exposed to cold, wet, and loud noise. While there may be exceptions, the measurements noted are generally defined as--Constantly: 5.5+ hours per 8-hour day; Frequently: 2.5 - 5.5 hours per 8-hour day; Occasionally: 0 - 2.5 hours per 8-hour day.