PMID- 10376482
OWN - NLM
STAT- MEDLINE
DCOM- 19990830
LR  - 20131121
IS  - 0172-4622 (Print)
IS  - 0172-4622 (Linking)
VI  - 20
IP  - 4
DP  - 1999 May
TI  - Effects of ingesting a sports bar versus glucose polymer on substrate utilisation 
      and ultra-endurance performance.
PG  - 252-7
AB  - The purpose of this study was to determine whether the ingestion of a sports bar 
      (BAR) containing a mixture of fat (7 g), protein (14 ) and carbohydrate (CHO; 19 
      ) improved ulta-endurance cycling performance compared to when an equicaloric 
      amount of CHO was consumed. On two occasions separated by a minimum of 7 days, 
      six highly trained (peak power output [PPO] 414 +/- 8 W) endurance cyclists rode 
      for 330 min at approximately 50% of PPO (203 +/- 8 W) while ingesting either the 
      BAR or just CHO, before performing a 400 k] time trial as fast as possible. Rates 
      of fat oxidation were significantly greater at the end of the submaximal ride 
      when subjects ingested the BAR compared to CHO (1.09 +/- 0.08 vs 0.73 +/- 0.08g x 
      min(-1); P<0.05), and accordingly total fat oxidation was significantly higher 
      (280 +/- 24 vs 203 +/- 25 g, P < 0.05). However, two subjects failed to complete 
      the time trial after they consumed the BAR during the prolonged, submaximal ride, 
      whereas all subjects managed to finish the time trial when ingesting CHO. In 
      conclusion, ingestion of the sports bar enhanced fat metabolism during prolonged, 
      submaximal exercise, but impaired subsequent high-intensity time-trial 
      performance.
FAU - Rauch, H G
AU  - Rauch HG
AD  - MRC/UCT Bioenergetics of Exercise Research Unit, University of Cape Town Medical 
      School, Sports Science Institute of South Africa, Newlands. 
      lrauch@sports.uct.ac.za
FAU - Hawley, J A
AU  - Hawley JA
FAU - Woodey, M
AU  - Woodey M
FAU - Noakes, T D
AU  - Noakes TD
FAU - Dennis, S C
AU  - Dennis SC
LA  - eng
PT  - Journal Article
PL  - Germany
TA  - Int J Sports Med
JT  - International journal of sports medicine
JID - 8008349
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Dietary Fats)
RN  - 0 (Polymers)
RN  - IY9XDZ35W2 (Glucose)
SB  - IM
MH  - Adult
MH  - Bicycling/*physiology
MH  - Dietary Carbohydrates/*metabolism
MH  - Dietary Fats/*metabolism
MH  - Dietary Supplements
MH  - Eating
MH  - Glucose/analogs & derivatives
MH  - Humans
MH  - Male
MH  - Physical Fitness/*physiology
MH  - Polymers
EDAT- 1999/06/22 00:00
MHDA- 1999/06/22 00:01
CRDT- 1999/06/22 00:00
PHST- 1999/06/22 00:00 [pubmed]
PHST- 1999/06/22 00:01 [medline]
PHST- 1999/06/22 00:00 [entrez]
AID - 10.1055/s-2007-971126 [doi]
PST - ppublish
SO  - Int J Sports Med. 1999 May;20(4):252-7. doi: 10.1055/s-2007-971126.