Table 13. Heart rate and Work Load Index of workers.
| Category | Mean(beat/min) | Min(beat/min) | Max(beat/min) | WLI(%) |
| Site 1 | Worker1 | 115.0 | 72.0 | 143.0 | 60.5 |
| Worker2 | 114.0 | 75.0 | 148.0 | 53.4 |
| Worker3 | 124.0 | 80.0 | 141.0 | 72.1 |
| Worker4 | 115.0 | 77.0 | 146.0 | 55.1 |
| Mean | 117.0 | 76.0 | 144.5 | 60.3 |
| Site 2 | Worker5 | 113.0 | 81.0 | 131.0 | 68.9 |
| Worker6 | 115.0 | 77.0 | 138.0 | 62.2 |
| Worker7 | 108.0 | 82.0 | 141.0 | 44.1 |
| Mean | 112.0 | 80.0 | 136.7 | 58.4 |
| Site 3 | Worker8 | 119.0 | 76.0 | 146.0 | 61.4 |
| Worker9 | 118.0 | 81.0 | 154.0 | 50.6 |
| Worker10 | 98.0 | 73.0 | 121.0 | 52.1 |
| Worker11 | 106.0 | 78.0 | 134.0 | 50.0 |
| Mean | 110.0 | 77.0 | 138.8 | 53.5 |
| Site 4 | Worker12 | 118.0 | 84.0 | 138.0 | 62.9 |
| Worker13 | 112.0 | 78.0 | 144.0 | 51.5 |
| Worker14 | 115.0 | 83.0 | 142.0 | 54.2 |
| Mean | 115.0 | 81.7 | 141.3 | 56.2 |
| Site 5 | Worker15 | 122.0 | 84.0 | 141.0 | 66.7 |
| Worker16 | 118.0 | 77.0 | 144.0 | 61.2 |
| Worker17 | 124.0 | 78.0 | 152.0 | 59.0 |
| Mean | 121.3 | 79.7 | 145.7 | 62.3 |
| Grand mean | 114.9 | 78.6 | 150.4 | 58.0 |