Occasionally walk, reach overhead, reach at shoulder, reach at knee, reach at floor, bend, stoop, squat, crouch, kneel, climb stairs, pivot, twist, pinch, and use fine motor movements. 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.