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Percentage reduction of the average strength of back of the respondents
| Age group | Before lunch | Just before end of work |
|---|---|---|
| 20-35 years (n=20) | 2.49 (0.9) | 8.29 (2) |
| 36-50 years (n=20) | 2.15 (1.1) | 8.86 (1.9) |
| Total (20-50 years) (n=40) | 2.32 (0.2) | 8.57 (0.4) |
Note: Figures in parentheses indicate standard deviation (SD) RULA and REBA Scores
