Exercise Training under Exposure to Low Levels of Fine Particulate Matter: Effects on Heart Oxidative Stress and Extra-to-Intracellular HSP70 Ratio

Table 3

Blood lactate concentration of mice exposed to fine particulate matter (PM_2.5) submitted to exercise training.

	CON	PM2.5	MIT	MIT + PM2.5	HIT	HIT + PM2.5	ANOVA ( value)
5th week	—	—	4.54 ± 0.21	3.90 ± 0.33	4.17 ± 0.22	4.04 ± 0.19	0.299
9th week	—	—	4.20 ± 0.20	4.00 ± 0.20	5.13 ± 0.86	5.40 ± 0.36	0.024

Blood lactate concentration (mmol·L⁻¹) expressed as mean ± SEM. 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. PM_2.5: exposure group, received 5 μg of PM_2.5 daily, maintained sedentary. MIT + PM_2.5: moderate intensity training group, received 5 μg of PM_2.5 daily. HIT + PM_2.5: high intensity training group, received 5 μg of PM_2.5 daily (n = 5-6 per group). Data analysed by two-way ANOVA followed by Tukey’s multiple comparison test. There was no effect of PM_2.5 () and interaction (), but there was an effect of exercise (). Both HIT and HIT + PM_2.5 showed higher levels in the 8th week in comparison with the MIT and MIT + PM_2.5 groups () and also higher than itself in the 5th week of exercise effort ().