Table 2.
Body weight of mice exposed to fine particulate matter (PM2.5) submitted to 12 weeks of exercise training.
| CON | PM2.5 | MIT | MIT + PM2.5 | HIT | HIT + PM2.5 | ANOVA (P value) | |
|---|---|---|---|---|---|---|---|
| Before | 19.0 ± 3.0 | 18.5 ± 3.1 | 18.0 ± 1.8 | 17.6 ± 2.3 | 19.0 ± 1.7 | 19.5 ± 2.2 | 0.832 |
| 4th week | 24.6 ± 2.2† | 24.9 ± 2.1§ | 23.5 ± 2.7† | 23.1 ± 2.3† | 24.9 ± 0.5† | 22.2 ± 4.0 | 0.414 |
| 8th week | 27.3 ± 1.8§ | 28.1 ± 2.7§ | 24.7 ± 2.5∗ | 27.1 ± 3.0§ | 25.3 ± 0.9† | 25.2 ± 3.9† | 0.214 |
| 12th week | 28.0 ± 3.6§ | 28.7 ± 2.8§ | 26.7 ± 2.2∗ | 27.9 ± 2.9§ | 26.7 ± 2.5§ | 26.0 ± 3.3† | 0.650 |
| Δ (12th week − before) | 8.9 ± 4.5 | 9.1 ± 4.4 | 8.6 ± 3.2 | 8.8 ± 3.7 | 8.1 ± 3.1 | 6.4 ± 4.7 | 0.896 |
Body weight (g) expressed as mean ± standard deviation. CON: control group, received 10 μL saline daily, maintained sedentary. MIT: moderate intensity training group, received 10 μL saline daily. HIT: high intensity training group, received 10 μL saline daily. PM2.5: exposure group, received 5 μg of PM2.5 daily, maintained sedentary. MIT + PM2.5: moderate intensity training group, received 5 μg of PM2.5 daily. HIT + PM2.5: high intensity training group, received 5 μg of PM2.5 daily (n = 5-6 per group). Data analysed by two-way ANOVA followed by Tukey's multiple comparison test. There was an effect of time (P < 0.001) and no effect of treatment (P = 0.129) or interaction between time and treatment (P = 0.854). Time effects are indicated as ∗P < 0.05, †P < 0.01, and §P < 0.001 versus initial body weight (“before” data) in each respective group. The difference between final and initial body weight (Δ body weight 12th week − before) was not different among experimental groups (P = 0.911).