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Effect of different types of physical exercise (race blank; maximal exercise shaded; daily exercise lined) on stereotypic behaviour (a) and exploitive activity (b) of Standardbred horses housed in single stalls. Mares were examined at rest in their stalls (Time I), immediately after exercise (Time II), one (Time III), and two hours (Time V) after the completion of exercise. Values are expressed as means ± SE.
