| BMI categories | Session 1 No. & (%) | Session 8 No. & (%) | Change No. & (%) |
| Underweight (<18.5) | 4 (0.4%) | 5 (0.5%) | +1 |
| Normal (18.5 - 24.9) | 67 (6.9%) | 88 (9.1%) | +21 |
| Overweight (25.0 - 29.9) | 243 (25.1%) | 270 (27.9%) | +27 |
| Obesity class I (30.0 - 34.9) | 355 (36.6%) | 356 (36.7%) | +1 |
| Obesity class II (35.0 - 39.9) | 207 (21.4%) | 170 (17.5%) | −37 |
| Extreme obesity (class III) (equal or more than 40.0) | 93 (9.6%) | 80 (8.3%) | −13 |
| Total | 969 (100%) | 969 (100%) | 0.0 |
| P value* | <0.001 | ||