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Representative traces and contractile effect on rat trachea induced by CCh in control, G3, G4 and G5 (A and B, lower intensities), and G6 and G8 (C e D, higher intensities) groups. Data are reported as the means ± SEM (n = 5 per group). G3, G4, G5, G6 and G8: exercise intensity based on loading with 3, 4, 5, 6 and 8% of body weight, respectively, during swimming exercise. *P<0.05 vs. control; #P<0.05 vs. G3 (one-way ANOVA test). CCh: carbachol.
