Efecto del consumo agudo de cafeína sobre la fuerza máxima y los niveles de lactato en sangre en jóvenes sedentarios: Ensayo clínico aleatorizado

  • Amy Andrea Arteaga-Sacro Universidad San Buenaventura
  • Diego Fernando Villota-Bedoya Universidad San Buenaventura

Resumen

Objetivo: El propósito del estudio fue demostrar el efecto de la cafeína en consumo agudo sobre la fuerza máxima y los niveles de lactato. Material y métodos: Ensayo clínico aleatorizado controlado de grupos paralelos ciego simple (participante). Se seleccionaron 92 sujetos, 43 fueron asignados aleatoriamente al grupo de ingesta de cafeína (1,3 mg/Kg) o el control con placebo. Se utilizó el test de 1RM para medir la fuerza máxima y el lactato se determinó mediante espectrofotometría (Kit comercial Sigma) antes y después de 1 hora de la ingestión de cafeína (1,3 mg/Kg) o placebo. El análisis estadístico se realizó con la prueba t-student, el cambio porcentual y el tamaño del efecto con la d-Cohens, p ≤ 0,05. Resultados: Se produjo una mejoraría significativa en la fuerza máxima de miembro superior de 1RM 8,3 ± 6,0 kg con un tamaño efecto medio (26,2%; d= 0,64; t= -4,36; gl=41; p <0,01; IC: -16,9 a -6,2); y de miembro inferior de 1RM 9,2 ± 4,9 kg con un tamaño del efecto medio (25,8%; d= 0,51; t= -3,16; gl=41; p <0,01; IC: -17,0 a -3,7). Para los niveles de lactato se observó un aumento menor en el grupo experimental 0,96 ± 0,10 mmol/L con un tamaño del efecto pequeño (64,9%; d=0,39; t= 10,8; gl=41; p <0,01; IC: 0,55 a 0,81). Conclusiones: La cafeína en dosis baja produce un incremento superior en la fuerza máxima de miembro superior, seguido por la fuerza máxima de miembro inferior y favorece un incremento menor de los niveles de lactato.

Abstract

Objective: The aim of this study was to demonstrate the effect of caffeine in acute consumption on the maximum force and lactate levels. Material and methods: A randomized controlled trial of single-blind parallel group (participant) was done where 92 subjects were selected, 43 were assigned randomly to the caffeine intake group (1, 3 mg/Kg) or placebo control. The 1RM test was used to measure the maximum force and the lactate was determined by spectrophotometry (Sigma Kit commercial) before and after an hour of caffeine intake (1, 3 mg/Kg) or placebo. The statistical analysis was performed using the student t- test, and the percentage change and the effect size with Cohen's d-p ≤ 0.05. Results: There was a significant improve in the maximum force of upper limb of 1RM 8.3 ± 6.0 kg with an average effect size (26.2%; d = 0.64, t = -4.36, df = 41, p <0.01; CI: -16.9 to -6.2); and lower limb 1RM 9.2 ± 4.9 kg with a medium effect size (25.8%; d = 0.51, t = -3.16, df = 41, p <0.01, CI : -17.0 to -3.7). An increase in the lactate levels  was observed in the experimental group 0.96 ± 0.10 mmol/L with a small effect size (64.9%; d = 0, 39; t = 10.8; gl = 41; p < 0.01;) CI: 0.55 to 0.81). Conclusions: Caffeine in low doses produces a higher increase in the maximum strength of upper limb, followed by the maximum force of lower limb and favors a smaller increase in lactate levels.

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Biografía del autor/a

Amy Andrea Arteaga-Sacro, Universidad San Buenaventura
Fisioterapeuta, Magister en Bioquímica Clínica. Docente Universidad San Buenaventura. Cartagena, Colombia.
Diego Fernando Villota-Bedoya, Universidad San Buenaventura
Fisioterapeuta, Magister en Neurorehabilitación. Docente Universidad San Buenaventura. Cartagena, Colombia

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Publicado
2016-08-31
Cómo citar
Arteaga-Sacro, A., & Villota-Bedoya, D. (2016). Efecto del consumo agudo de cafeína sobre la fuerza máxima y los niveles de lactato en sangre en jóvenes sedentarios: Ensayo clínico aleatorizado. Universidad Y Salud, 18(2), 266 - 275. https://doi.org/10.22267/rus.161802.37
Sección
Artículo de investigación científica y tecnológica