PMID- 22248497
OWN - NLM
STAT- MEDLINE
DCOM- 20120517
LR  - 20191112
IS  - 1543-2742 (Electronic)
IS  - 1526-484X (Linking)
VI  - 22
IP  - 1
DP  - 2012 Feb
TI  - A comparative analysis between the effects of galactose and glucose 
      supplementation on endurance performance.
PG  - 24-30
AB  - PURPOSE: To determine beneficial effects of short-term galactose (GAL) 
      supplementation over a 50:50 glucose-maltodextrin (GLUC) equivalent on self-paced 
      endurance cycling performance. METHODS: On 2 separate occasions, subjects 
      performed a 100-km self-paced time trial (randomized and balanced order). This 
      was interspersed with four 1-km and four 4-km maximal efforts reflecting the 
      physical requirements of racing. Before each trial 38+/-3 g of GAL or GLUC was 
      ingested in a 6% concentrate fluid form 1 hr preexercise and then during exercise 
      at a rate of 37+/-3 g/hr. Performance variables were recorded for all 1- and 4-km 
      efforts, all interspersed intervals, and the total 100-km distance. Noninvasive 
      indicators of work intensity (heart rate [HR] and rating of perceived exertion) 
      were also recorded. RESULTS: Times taken to complete the 100-km performance trial 
      were 8,298+/-502 and 8,509+/-578 s (p=.132), with mean power outputs of 271+/-37 and 
      256+/-45 W (p=.200), for GAL and GLUC, respectively. Mean HR did not differ (GAL 
      157+/-7 and GLUC 157+/-7 beats/min, p=.886). A main effect of carbohydrate (CHO) type 
      on time to complete 4-km efforts occurred, with no CHO TypexEffort Order 
      interaction observed. No main effect of CHO type or interaction of CHO 
      TypexSequential Order occurred for 1-km efforts. CONCLUSION: A 6% GAL drink does 
      not enhance performance time during a self-paced cycling performance trial in 
      highly trained endurance cyclists compared with a formula typically used by 
      endurance athletes but may improve the ability to produce intermediate self-paced 
      efforts.
FAU - Macdermid, Paul W
AU  - Macdermid PW
AD  - School of Sport and Exercise, Massey University Manawatu (Turitea), Manawatu, New 
      Zealand.
FAU - Stannard, Stephen
AU  - Stannard S
FAU - Rankin, Dean
AU  - Rankin D
FAU - Shillington, David
AU  - Shillington D
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Randomized Controlled Trial
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Int J Sport Nutr Exerc Metab
JT  - International journal of sport nutrition and exercise metabolism
JID - 100939812
RN  - 0 (Performance-Enhancing Substances)
RN  - IY9XDZ35W2 (Glucose)
RN  - X2RN3Q8DNE (Galactose)
SB  - IM
MH  - Adult
MH  - Athletic Performance/*physiology
MH  - Bicycling
MH  - Diet Records
MH  - *Dietary Supplements/adverse effects
MH  - Double-Blind Method
MH  - Galactose/*administration & dosage/adverse effects
MH  - Glucose/*administration & dosage/adverse effects
MH  - Heart Rate
MH  - Humans
MH  - Male
MH  - Performance-Enhancing Substances/*administration & dosage/adverse effects
MH  - Physical Endurance/*physiology
MH  - Physical Exertion
MH  - Physical Fitness/*physiology
MH  - Time Factors
EDAT- 2012/01/18 06:00
MHDA- 2012/05/18 06:00
CRDT- 2012/01/18 06:00
PHST- 2012/01/18 06:00 [entrez]
PHST- 2012/01/18 06:00 [pubmed]
PHST- 2012/05/18 06:00 [medline]
AID - 10.1123/ijsnem.22.1.24 [doi]
PST - ppublish
SO  - Int J Sport Nutr Exerc Metab. 2012 Feb;22(1):24-30. doi: 10.1123/ijsnem.22.1.24.