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Changes in physiology during the 120 min running trial. Running economy (solid circles, A); the percentage change of RE relative to the initial 15 min time point (B); respiratory exchange ratio (solid triangles, C); Blood lactate concentration (open triangles, D). Different from 15 min: *p < 0.05, **p < 0.01, ***p < 0.001. Data are mean ± SD (n = 14).
