From: Muscle fatigue in relation to forearm pain and tenderness among professional computer users
Characteristics | Cases | Referents |
---|---|---|
Gender, n (%) | ||
Female | 15 (83%) | 17 (85%) |
Male | 3 (17%) | 3 (15%) |
Age, years, mean (min-max) | 43.0 (25.5–53.4) | 43.8 (28.4–55.2) |
Body mass index, kg/m2, mean (min-max) | 24.6 (30.7–19.3) | 23.6 (34.6–19.5) |
Smoking, n (%) | ||
Never smoking | 8 (44%) | 12 (60%) |
Ex-smoker | 7 (39%) | 4 (20%) |
Current smoker | 3 (17%) | 4 (20%) |
Leisure time physical activity, n (%) | ||
Less than 2 hours/week | 5 (28%) | 4 (20%) |
2–4 hours/week | 8 (44%) | 10 (50%) |
More than 4 hours/week | 5 (28%) | 6 (20%) |
Working conditions1, mean (SD) | ||
Work hours/week | 37.0 (5.0) | 35.5 (3.3) |
Computer use, hours/week | 28.6 (5.7) | 23.9 (9.3) |
Mouse use, hours/week | 22.0 (11.1) | 18.9 (12.8) |
Wrist extension force, mean (SD) | ||
Maximal voluntary contraction (Newton) | 107.9 (51.5) | 110.1 (32.6) |
Stimulation current (mA), mean (SD) | 40.1 (4.9) | 39.6 (3.1) |
Twitch force at baseline (Newton), mean (SD) | 2.32 (1.63) | 2.27 (1.56) |