| Doing strenuous exercise | Frequency | Percent (%) |
| Never | 85 | 34.0 |
| Rarely | 87 | 34.8 |
| Less than once a week | 20 | 8.0 |
| Once a week | 17 | 6.8 |
| 2 or 3 times a week | 13 | 5.2 |
| 4 or 6 times a week | 18 | 7.2 |
| Everyday | 10 | 4.0 |