PMID- 34498818
OWN - NLM
STAT- MEDLINE
DCOM- 20220126
LR  - 20220126
IS  - 1827-1928 (Electronic)
IS  - 0022-4707 (Linking)
VI  - 62
IP  - 3
DP  - 2022 Mar
TI  - Caffeine coingested with carbohydrate on performance recovery in national-level 
      paddlers: a randomized, double-blind, crossover, placebo-controlled trial.
PG  - 337-342
LID - 10.23736/S0022-4707.21.12125-5 [doi]
AB  - 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 5x500 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.
FAU - Barzegar, Homeyra
AU  - Barzegar H
AD  - Department of Exercise Physiology, Faculty of Sport Sciences, University of 
      Guilan, Rasht, Iran.
FAU - Arazi, Hamid
AU  - Arazi H
AD  - Department of Exercise Physiology, Faculty of Sport Sciences, University of 
      Guilan, Rasht, Iran - hamidarazi@yahoo.com.
FAU - Mohebbi, Hamid
AU  - Mohebbi H
AD  - Department of Exercise Physiology, Faculty of Sport Sciences, University of 
      Guilan, Rasht, Iran.
FAU - Sheykhlouvand, Mohsen
AU  - Sheykhlouvand M
AD  - Department of Exercise Physiology, Faculty of Sport Sciences, University of 
      Guilan, Rasht, Iran.
FAU - Forbes, Scott C
AU  - Forbes SC
AD  - Department of Physical Education Studies, Brandon University, Brandon, MB, 
      Canada.
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20210909
PL  - Italy
TA  - J Sports Med Phys Fitness
JT  - The Journal of sports medicine and physical fitness
JID - 0376337
RN  - 0 (Dietary Carbohydrates)
RN  - 3G6A5W338E (Caffeine)
RN  - 9005-79-2 (Glycogen)
SB  - IM
MH  - Bicycling
MH  - *Caffeine
MH  - Cross-Over Studies
MH  - *Dietary Carbohydrates
MH  - Double-Blind Method
MH  - Exercise
MH  - Glycogen
MH  - Humans
MH  - Male
EDAT- 2021/09/10 06:00
MHDA- 2022/01/27 06:00
CRDT- 2021/09/09 08:58
PHST- 2021/09/10 06:00 [pubmed]
PHST- 2022/01/27 06:00 [medline]
PHST- 2021/09/09 08:58 [entrez]
AID - S0022-4707.21.12125-5 [pii]
AID - 10.23736/S0022-4707.21.12125-5 [doi]
PST - ppublish
SO  - J Sports Med Phys Fitness. 2022 Mar;62(3):337-342. doi: 
      10.23736/S0022-4707.21.12125-5. Epub 2021 Sep 9.