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Comparison of ventilatory and oxygen consumption measurements of yearling Thoroughbred colts and fillies exercising unridden on an all-weather track.
Katz, L M; Gough, K; McGivney, C L; McGivney, B; Sides, R H; Hill, E W; Bayly, W M.
Afiliación
  • Katz LM; UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin D04 W6F6, Ireland. Electronic address: lisa.katz@ucd.ie.
  • Gough K; UCD School of Agriculture and Food Science, University College Dublin, Belfield, Dublin D04 W6F6, Ireland.
  • McGivney CL; UCD School of Agriculture and Food Science, University College Dublin, Belfield, Dublin D04 W6F6, Ireland.
  • McGivney B; UCD School of Agriculture and Food Science, University College Dublin, Belfield, Dublin D04 W6F6, Ireland.
  • Sides RH; Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USA.
  • Hill EW; UCD School of Agriculture and Food Science, University College Dublin, Belfield, Dublin D04 W6F6, Ireland.
  • Bayly WM; Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USA.
Vet J ; 300-302: 106041, 2023.
Article en En | MEDLINE | ID: mdl-37931872
Sex effects on ventilatory and oxygen consumption (V̇O2) measurements during exercise have been identified in humans. This study's aim was to evaluate the hypothesis that there are sex effects on ventilatory and V̇O2 measurements in exercising, untrained yearling Thoroughbreds (Tb). Forty-one Tbs (16 colts, 25 fillies; 19.8 ± 1.4 months old) were recruited. Physiological, ventilatory and exercise data were gathered from horses exercising unridden at high intensity on an all-weather track from a global positioning-heart rate unit and a portable ergospirometry system. Data were analysed with an unpaired Student's t-test and the Benjamini-Hochberg correction for multiple testing (P ≤ 0.05 significant). Mean bodyweight (BW, P = 0.002) and wither height (P = 0.04) were greater for colts than fillies. There were no differences in physiological and exercise data and absolute peak V̇O2 between groups. However, fillies had a higher mass specific peak V̇O2 (P = 0.03) than colts (121.5 ± 21.6 mL/kg.min vs. 111.9 ± 27.4 mL/kg.min). The peak breathing frequency was greater for fillies (P < 0.001) while the peak inspiratory (P < 0.001) and expiratory air flow (P < 0.001), peak expiratory tidal volume (VTE; P < 0.001) and peak minute ventilation (V̇E; P = 0.01) were greater for colts; there were no differences for peak VTE and V̇E when adjusted for BW. Differences in BW explain the differences in mass specific peak V̇O2 between groups. Given their morphological differences, it is likely that lung volumes and airway diameters are smaller for fillies, resulting in greater resistance and lower air flows and volumes. Further research is required to investigate the ventilatory differences and how they may change with maturation and impact performance.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Consumo de Oxígeno / Respiración Límite: Animals / Female / Humans / Male Idioma: En Revista: Vet J Asunto de la revista: MEDICINA VETERINARIA Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Consumo de Oxígeno / Respiración Límite: Animals / Female / Humans / Male Idioma: En Revista: Vet J Asunto de la revista: MEDICINA VETERINARIA Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido