Long-term performance and body composition of sows given differing levels of feed intake during pregnancy and lactation

The present experiment was designed to investigate the influence of variations in energy intake during both pregnancy and lactation on changes in body weight, backfat and body composition of the sow after four parities and the extent to which these may have influenced overall sow productivity.The experiment has been designed in a 2 x 2 factorial arrangement involving two levels of feeding during both pregnancy and lactation. The feeding levels in pregnancy were planned to produce net maternal body weight gains of 30kg (H) and 10kg (L). At each of these, two feeding regimes were applied during a 3 week lactation, one being at a conventional level (H) and the other 25% below this (L). The experiment thus involved four groups of animals given different levels of feeding during both pregnancy and lactation, designated: High-High (HH), High-Low (HL), Low-High (LH), Low-Low (LL). No creep feed was provided to the piglets during the suckling period. At the start of the experiment the gilts weighed 115kg live weight with a backfat thickness at the P2 position of 18mm. They remained on the same treatment throughout four parities and were slaughtered after weaning their fourth litters when the carcasses were retained for analysis. Data are presented from 66 sows; 17(HH), 17(HL), 16(LH), 16(LL).

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Comparación de las variaciones de la composición corporal entre judokas y luchadores hidratados Vs deshidratados (Comparison of body composition variations between hydrated and dehydrated judokas and wrestler)

Retos ◽

10.47197/retos.v0i33.52857 ◽

2017 ◽

pp. 10-13

Author(s):

Bibiana Calvo Rico ◽

Luis Fernandes Monteiro ◽

Susana Aznar Laín ◽

José Manuel García García

Keyword(s):

Body Composition ◽

Detrimental Effect ◽

El Sistema ◽

Kolmogorov Smirnov ◽

Short And Long Term ◽

Optimal Values ◽

Mean Differences ◽

Long Term Performance ◽

Term Performance

El propósito de este estudio fue conocer cómo se modifican los parámetros de composición corporal en deportes como judo y lucha, ambos deportes divididos por categorías de peso en los cuales, de manera habitual se producen desórdenes alimentarios y continuas deshidrataciones para la búsqueda del peso de competición. Igualmente se trató de conocer si existían diferencias entre hombres y mujeres en esta práctica y diferencias entre ambos deportes. Para ello, se utilizó el sistema Inbody Biospace 230 (CA,USA) a una muestra de élite nacional de judo y lucha del equipo español y portugués de 64 deportistas (n=64). El análisis estadístico se ejecutó mediante las pruebas: Kolmogorov-Smirnov y t de students para analizarlas diferencias de medias. Los resultados y conclusiones del estudio demostraron entre otros, que el número de atletas que se encontraban deshidratados en el momento pre-competitivo es mayor que los que están en valores óptimos de hidratación, sometiendo al organismo a constantes esfuerzos y cambios, pudiendo ser este un efecto perjudicial a corto y largo plazo en el rendimiento para el atleta, tanto en el entrenamientos como para la propia competición.Abstract. The aim of this study was to determine how body composition parameters are modified in judo and wrestling. Both disciplines are organized by weight categories, this regularly leading to eating disorders and continuous dehydration in order to reach the needed competition weight. Also, this paper aims to understand whether there exist differences in this practice by gender and by sports discipline. A Biospace Inbody 230 system (CA, USA) was employed on a sample of 64 national elite judo and wrestling athletes from Spain and Portugal. Statistical analysis was performed using Kolmogorov-Smirnov and student t tests, which analyze mean differences. The findings and conclusions of the study showed a higher number of dehydrated athletes than those in optimal values of hydration during the pre-competitive period. This condition pushes athletes’ body to constant efforts and changes, possibly determining a detrimental effect on their short- and long-term performance, both in training and competitions.

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