PMID- 9588621
OWN - NLM
STAT- MEDLINE
DCOM- 19980707
LR  - 20190831
IS  - 0195-9131 (Print)
IS  - 0195-9131 (Linking)
VI  - 30
IP  - 5
DP  - 1998 May
TI  - Effect of elevated blood FFA levels on endurance performance after a single fat 
      meal ingestion.
PG  - 763-8
AB  - PURPOSE: This study was designed to examine the effect of elevated blood free 
      fatty acid (FFA) levels on carbohydrate (CHO) oxidation and cycling performance 
      after ingesting a single fat meal (FM). METHODS: Four hours before cycling 
      exercise, nine trained males consumed either a FM (4711 kJ; 30% CHO, 61% fat, and 
      9% protein) or control meal (CM) (4877 kJ; 58% CHO, 31% fat, and 11% protein). 
      The intensity of exercise employed was 67% of the maximal oxygen consumption 
      (VO2max) for the first 120 min of exercise, followed by an increase to 78% 
      VO2max. RESULTS: The FM ingestion significantly (P < 0.05 and P < 0.01) elevated 
      serum FFA levels above those resulting from CM ingestion almost throughout the 
      entire exercise. A significantly (P < 0.05 and P < 0.01) lower respiratory 
      exchange ratio in the FM versus the CM trials was observed during the first hour 
      of exercise. This was accompanied by a significantly greater amount of fat 
      oxidized at 20 (P < 0.01) and 60 min (P < 0.05) of FM trials and a significantly 
      smaller amount of CHO oxidized at 20 min (P < 0.05) of FM trials. However, 
      endurance time and work production did not differ between the FM (141 +/- 8 min, 
      134333 +/- 6049 kg x m (SEM)) and CM (138 +/- 5 min, 131450 +/- 4737 kg x m) 
      trials. Also, there were no significant differences in oxygen consumption, heart 
      rate, and perceived exertion or in glucose, lactate, and triglyceride levels in 
      the blood. CONCLUSIONS: These results suggest that the elevated blood FFA levels 
      after a single FM ingestion reduce CHO oxidation early in exercise, but this 
      decrease in CHO oxidation would not be adequate enough to contribute to an 
      increased endurance.
FAU - Okano, G
AU  - Okano G
AD  - Department of Exercise Science, Sapporo Medical University, Japan. 
      okano@sapmed.ac.jp
FAU - Sato, Y
AU  - Sato Y
FAU - Murata, Y
AU  - Murata Y
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Med Sci Sports Exerc
JT  - Medicine and science in sports and exercise
JID - 8005433
RN  - 0 (Dietary Fats)
RN  - 0 (Fatty Acids, Nonesterified)
RN  - 33X04XA5AT (Lactic Acid)
SB  - IM
MH  - Adult
MH  - Bicycling/*physiology
MH  - *Carbohydrate Metabolism
MH  - Dietary Fats/*administration & dosage
MH  - Fatty Acids, Nonesterified/*blood
MH  - Heart Rate
MH  - Humans
MH  - Lactic Acid/blood/metabolism
MH  - Male
MH  - Oxidation-Reduction
MH  - Oxygen Consumption
MH  - Physical Endurance/*physiology
EDAT- 1998/05/20 00:00
MHDA- 1998/05/20 00:01
CRDT- 1998/05/20 00:00
PHST- 1998/05/20 00:00 [pubmed]
PHST- 1998/05/20 00:01 [medline]
PHST- 1998/05/20 00:00 [entrez]
AID - 10.1097/00005768-199805000-00019 [doi]
PST - ppublish
SO  - Med Sci Sports Exerc. 1998 May;30(5):763-8. doi: 
      10.1097/00005768-199805000-00019.