Núm. 61 (2016)
Área 6. FISIOLOGÍA DEL EJERCICIO / EXERCISE PHYSIOLOGY

Efecto ergogénico de la ingesta de fosfato sódico en sujetos físicamente activos / Ergogenic Effect of Sodium Phosphate Intake in Physically Active Subjects

Publicado febrero 29, 2016

Resumen

Este estudio pretende evaluar los efectos de la ingesta de fosfato sódico a corto plazo, sobre la composición corporal, serie roja y parámetros ergoespirométricos máximos y submáximos. A una muestra de 20 sujetos físicamente activos, separados en dos grupos, se les suministró fosfato sódico durante 7 días (50 mg/kg masa magra) o placebo. Ambos grupos realizaron una prueba de esfuerzo incremental máxima en cicloergómetro, siguiendo el protocolo Fatmax, se les determinó la composición corporal y se les realizó un hemograma antes y después de la suplementación. En el grupo experimental, se observó una disminución en el peso e índice de masa corporal (IMC), un aumento en la potencia máxima alcanzada y una mejor eficiencia energética en la zona Fatmax. No se observaron cambios en parámetros hematológicos. Estos resultados pueden atribuir un efecto ergogénico al fosfato sódico en actividades aeróbicas y aquellas donde el peso corporal influya en el rendimiento.

PALABRAS CLAVE: ayuda ergogénica, masa grasa, IMC, hematocrito, VO2max, potencia, gasto energético.


ABSTRACT

This study aims to evaluate the effects of short-term sodium phosphate intake upon body composition, haemogram, maximal ergospirometer parameters and submaximal ones in the maximal fat oxidation zone (Fatmax). 20 active subjects participated in this study randomly divided into two groups: The experimental group which ingested sodium phosphate for 7 days (50 mg/kg lean mass) and the placebo group. Both performed an incremental maximal cycle ergo meter test following the Fatmax protocol, body composition assessment and blood analysis (CBC) before and after the supplementation period. In the experimental group, phosphate supplementation produced a decrease in weight and body mass index (BMI), an increase in maximal power output and it also improved energy efficiency in the Fatmax zone. No changes were observed in the parameters listed in the CBC. These results may attribute an ergogenic effect of sodium phosphate in aerobic activities and sports where body weight is considered to be an important factor for performance.

KEY WORDS: dietary sport supplement, fat mass, BMI, hematocrit, VO2max, power, energy expenditure.

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