Caffeine coingested with carbohydrate on performance recovery in national-level paddlers: a randomized, double-blind, crossover, placebo-controlled trial
Barzegar H, Arazi H, Mohebbi H, Sheykhlouvand M, Forbes SC
The Journal of sports medicine and physical fitness · 29 citas
Etiquetas de revisión
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Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2021-09-09 · J Sports Med Phys Fitness · vol. 62 · número 3 · págs. 337–342
- Editorial
- Edizioni Minerva Medica
- Citado
- 26 citas · más que el 92% de estudios similares · 2.8× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 29 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Muscle metabolism and nutrition · Sports Performance and Training
- Palabras clave
- caffeine, carbohydrate supplementation, post-exercise recovery, time trial performance, exhaustive exercise, muscle glycogen resynthesis, plasma cortisol, insulin, blood glucose
- MeSH
- humans, caffeine, glycogen, dietary carbohydrates, exercise, cross-over studies, double-blind method, bicycling, male
5 autores
- Homeyra BARZEGAR🇮🇷University of Guilan
- Hamid ARAZI🇮🇷 · autor de correspondenciaUniversity of Guilan
- Hamid Mohebbi🇮🇷University of Guilan
- Mohsen Sheykhlouvand🇮🇷University of Guilan
- Scott C. FORBES🇨🇦Brandon University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
Caffeine enhances muscle glycogen resynthesis postexercise; however, the next-day effects on recovery are unknown. The present study aimed to examine the effects of carbohydrate (CHO) supplementation with or without caffeine (CAF) 24-h following exhaustive exercise on time trial performance in elite paddling athletes.
Methods
Nine highly trained male paddlers (21±2 y) completed three experimental trials in a randomized, double-blind, crossover manner. Following an exhaustive exercise session (20-km timed paddle) participants ingested: 1) 0.6 g/kg of carbohydrate (CHO); 2) 0.6 g/kg of carbohydrate with 6 mg/kg of caffeine (CAF+CHO); or 3) placebo (PLA), at four time-points (immediately after, and 2, 6, and 12-h postexercise) in addition to their typical dietary intake. After 24 h, 5 attempts of on-water 500-m paddling time-trial was performed, and the average time was recorded. Blood samples were taken at rest and following both the 20-km and the 5×500 m exercise to determine changes in plasma cortisol, insulin, and glucose.
Results
There was a significant main effect of condition (P<0.001), with post-hoc analysis revealing that both CHO conditions (CHO: 98.7±2.8 s, P=0.0003; CAF+CHO: 97.9±2.3 s, P=0.0002) were significantly faster compared to PLA (101.0±3.1 s); however, CAF did not augment time trial performance compared to CHO (P=0.16). There was no significant condition by time interactions for glucose, cortisol, or insulin before and after the 20-km depleting exercise and 500-m time trial.
Conclusions
In elite male paddlers, CHO, independent of caffeine, enhanced time trial performance 24 hours following exhaustive exercise.
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