The average peak measured values from the inspiratory muscle strength test to fatigue for each time-point for <i>n</i> = 20 Thoroughbred horses in an inspiratory muscle training (IMT) treatment (Tr, <i>n</i> = 10) or control (Con, <i>n</i> = 10) group.

Data presented as mean ± SEM and analysed using a mixed linear model with P≤0.05 significant. *significantly different from T0. §significantly different from the Tr group.