Average time spent on repeated strenuous physical activities and repeated bending, twisting, or reaching at work on a typical workday, by gender, age, and back pain status, the USA, 1988
| Strenuous physical activities | Bending, twisting, or reaching | |||
|---|---|---|---|---|
| Attributes | Males Minutes (SE) | Females Minutes (SE) | Males Minutes (SE) | Females Minutes (SE) |
| All workers | 132 (3) | 62 (2) | 197 (3) | 133 (3) |
| 18–24 years | 169 (6) | 67 (4) | 244 (6) | 155 (6) |
| 25–34 years | 146 (5) | 63 (3) | 213 (5) | 133 (4) |
| 35–44 years | 121 (5) | 60 (4) | 176 (5) | 121 (5) |
| 45–54 years | 107 (5) | 62 (5) | 173 (6) | 132 (7) |
| 55–64 years | 118 (7) | 65 (6) | 182 (7) | 137 (8) |
| >64 years | 77 (9) | 41 (7) | 128 (11) | 104 (11) |
| Cases of back pain | ||||
| All back pain | 177 (6) | 91 (4) | 250 (6) | 180 (5) |
| 18–24 years | 219 (18) | 99 (11) | 314 (15) | 200 (15) |
| 25–34 years | 203 (11) | 86 (7) | 268 (11) | 190 (9) |
| 35–44 years | 171 (10) | 93 (8) | 231 (11) | 170 (9) |
| 45–54 years | 155 (12) | 84 (11) | 238 (14) | 148 (12) |
| 55–64 years | 141 (16) | 96 (15) | 226 (18) | 196 (17) |
| >64 years | 82 (20) | 100 (29) | 162 (29) | 199 (45) |
| RA back pain | 260 (9) | 168 (8) | 341 (8) | 292 (9) |
| RA only back pain | 274 (11) | 163 (10) | 350 (10) | 291 (12) |
| AI only back pain | 171 (19) | 142 (23) | 222 (21) | 215 (26) |