Key1: Exposure Time Strength Rating Rating of Exposure Time Definition (Hrs of time) Not Observed (N/O) Not Observed Infrequent (I) 1 Hr Occasional (O) 1 3 Hrs Frequent (F) 3 6 Hrs Constant (C) 6 8 Hrs Strength Rating DOT Definitions Sedentary 0 to 10 lbs performed Occasionally (O) Very Light 0 to 20 lbs performed Infrequently (I) Light 0 to 20 lbs performed Frequently (F) or Significant Walking or Standing Medium 20 to 50 lbs performed Occasionally (O) Or 10 to 20 lbs performed Frequently (F) or 10 lbs performed Constantly (C) Heavy 50 to 100 lbs performed Occasionally (O) or 25 to 50 lbs performed Frequently (F) or 10 to 20 lbs performed Constantly (C) *Based in part on US Department of Labors Dictionary of Occupational Titles (DOT), Physical Demands Strength Rating, 1991 Key2 : Essential Function Tasks Task Task Description 1 Occasionally pushing/pulling bed or chair, with and without a patient; force will vary from 5 lbs to 50 lbs; infrequent, slight but repetitive pushing during CPR is possible, duration can be from a few minutes to several hours. Table 1: Mobility Activity Duration EssentialFunction Task Example Sitting O 3,5,7 Standing C 1,2,3,4,5,6,7 Patient interactions Walking C 1,2,3,4,5,6,7 Running I 6 Emergent activities Climbing N/O 1,3,7 Stairs at homes, on buses Bending/Stooping F 3,4,7 Emptying catheter/Foley, putting on client shoes, picking up items off the floor Crouching O 3,4,7 Getting patient onto bedside commode Kneeling O 3,4 Crawling N/O Table 1: Mobility (continued) Activity Duration EssentialFunction Task Example Twisting F 1,2,3,5,6,7 Performing bedside tasks, Giving bath, using toiletries, adding items to soil bin Balancing O 1,2,3,4,5,6,7 Table 2: Strength Activity Duration EssentialFunction Task Example.