PMID- 21832305
OWN - NLM
STAT- MEDLINE
DCOM- 20120222
LR  - 20191112
IS  - 1543-2742 (Electronic)
IS  - 1526-484X (Linking)
VI  - 21
IP  - 5
DP  - 2011 Oct
TI  - The effect of adding caffeine to postexercise carbohydrate feeding on subsequent 
      high-intensity interval-running capacity compared with carbohydrate alone.
PG  - 410-6
AB  - The aim of this study was to test the hypothesis that adding caffeine to 
      postexercise carbohydrate (CHO) feedings improves subsequent high-intensity 
      interval-running capacity compared with CHO alone. In a repeated-measures design, 
      6 men performed a glycogen-depleting exercise protocol until volitional 
      exhaustion in the morning. Immediately after and at 1, 2, and 3 hr postexercise, 
      participants consumed 1.2 g/kg body mass CHO of a 15% CHO solution, a similar CHO 
      solution but with addition of 8 mg/kg body mass of caffeine (CHO+CAFF), or an 
      equivalent volume of flavored water only (WAT). After the 4-hr recovery period, 
      participants performed the Loughborough Intermittent Shuttle Test (LIST) to 
      volitional exhaustion as a measure of high-intensity interval-running capacity. 
      Average blood glucose values during the 4-hr recovery period were higher in the 
      CHO conditions (p < .005) than in the WAT trial (4.6 +/- 0.3 mmol/L), although 
      there was no difference (p = .46) between CHO (6.2 +/- 0.8 mmol/L) and CHO+CAFF 
      (6.7 +/- 1.0 mmol/L). Exercise capacity during the LIST was significantly longer in 
      the CHO+CAFF trial (48 +/- 15 min) than in the CHO (32 +/- 15 min, p = .04) and WAT 
      conditions (19 +/- 6 min, p = .001). All 6 participants improved performance in 
      CHO+CAFF compared with CHO (95% CI for mean difference = 1-32 min). The study 
      provides novel data by demonstrating that adding caffeine to postexercise CHO 
      feeding improves subsequent high-intensity interval-running capacity, a finding 
      that may be related to higher rates of postexercise muscle glycogen resynthesis 
      previously observed under similar feeding conditions.
FAU - Taylor, Conor
AU  - Taylor C
AD  - Research Institute for Sport and Exercise Sciences, Liverpool John Moores 
      University, Liverpool, UK.
FAU - Higham, Daniel
AU  - Higham D
FAU - Close, Graeme L
AU  - Close GL
FAU - Morton, James P
AU  - Morton JP
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20110810
PL  - United States
TA  - Int J Sport Nutr Exerc Metab
JT  - International journal of sport nutrition and exercise metabolism
JID - 100939812
RN  - 0 (Blood Glucose)
RN  - 0 (Central Nervous System Stimulants)
RN  - 0 (Dietary Carbohydrates)
RN  - 3G6A5W338E (Caffeine)
RN  - 9005-79-2 (Glycogen)
SB  - IM
MH  - Adult
MH  - Athletic Performance/physiology
MH  - Blood Glucose/*metabolism
MH  - Caffeine/*pharmacology
MH  - Central Nervous System Stimulants/*pharmacology
MH  - Dietary Carbohydrates/*pharmacology
MH  - Double-Blind Method
MH  - Glycogen/metabolism
MH  - Humans
MH  - Male
MH  - Physical Endurance/*physiology
MH  - Physical Exertion/*physiology
MH  - Physical Fitness/physiology
MH  - Rest/physiology
MH  - Running/*physiology
MH  - Young Adult
EDAT- 2011/08/13 06:00
MHDA- 2012/02/23 06:00
CRDT- 2011/08/12 06:00
PHST- 2011/08/12 06:00 [entrez]
PHST- 2011/08/13 06:00 [pubmed]
PHST- 2012/02/23 06:00 [medline]
AID - 2011_0028 [pii]
AID - 10.1123/ijsnem.21.5.410 [doi]
PST - ppublish
SO  - Int J Sport Nutr Exerc Metab. 2011 Oct;21(5):410-6. doi: 10.1123/ijsnem.21.5.410. 
      Epub 2011 Aug 10.