We tested the hypothesis that diet affects equine feeding behavior and that diet composition affects a shift in energy metabolism characterized by a wide range of neuroendocrine changes. We investigated the effects of training sessions on circulating serotonin (5-HT), tryptophan, and β-endorphin (β-EN) concentrations in horses to ascertain whether two different isoenergetic diets would affect this response. Thirty-six Dutch Warmblood horses were randomly distinguished in 18 horses fed with a low-fiber diet (LF) and 18 horses fed with a high-fiber diet (HF). The training session was represented by a medium-heavy exercise and consisted of 21 minutes/day of walk, 36 minutes/day of trot, 15 minutes/day of canter, for a total of 72 minutes/day. At the end of this session, a set exercise test was performed. There was a significant increase in plasma 5-HT (P < 0.0001) and β-EN (P < 0.0001) concentrations following exercise compared to baseline values, in both HF and LF groups. No significant changes were observed for plasma tryptophan concentrations after exercise. A two-way analysis of variance showed significant effects of medium-heavy workload exercise treatments and time points of sampling during exercise on 5-HT and β-EN changes. Plasma 5-HT and β-EN patterns are presumably linked to the workload exercise effect, as shown by their increasing trend in both HF and LF groups.

The effect of training sessions and feeding regimes on mudulator role of serotonin, tryptophan and β-endorphin of horses

Bruschetta G.
Primo
;
Medica P.;Fazio E.;Cravana C.;Ferlazzo A. M.
Ultimo
2018

Abstract

We tested the hypothesis that diet affects equine feeding behavior and that diet composition affects a shift in energy metabolism characterized by a wide range of neuroendocrine changes. We investigated the effects of training sessions on circulating serotonin (5-HT), tryptophan, and β-endorphin (β-EN) concentrations in horses to ascertain whether two different isoenergetic diets would affect this response. Thirty-six Dutch Warmblood horses were randomly distinguished in 18 horses fed with a low-fiber diet (LF) and 18 horses fed with a high-fiber diet (HF). The training session was represented by a medium-heavy exercise and consisted of 21 minutes/day of walk, 36 minutes/day of trot, 15 minutes/day of canter, for a total of 72 minutes/day. At the end of this session, a set exercise test was performed. There was a significant increase in plasma 5-HT (P < 0.0001) and β-EN (P < 0.0001) concentrations following exercise compared to baseline values, in both HF and LF groups. No significant changes were observed for plasma tryptophan concentrations after exercise. A two-way analysis of variance showed significant effects of medium-heavy workload exercise treatments and time points of sampling during exercise on 5-HT and β-EN changes. Plasma 5-HT and β-EN patterns are presumably linked to the workload exercise effect, as shown by their increasing trend in both HF and LF groups.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3120001
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