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- W1896648047 abstract "Six male subjects received either a saline (control) or Intralipid infusion during 30 min rest and 15 min cycling at 85% maximal O2 uptake (VO2max) to examine the regulation of fat-carbohydrate interaction (glucose-fatty acid cycle) in skeletal muscle. Muscle biopsies were sampled immediately before and at 3 and 15 min of exercise in both trials. A muscle biopsy was also taken at -30 min rest in the Intralipid trial. Intralipid infusion significantly elevated plasma free fatty acids above control during rest (0.21 +/- 0.04 to 0.94 +/- 0.09 mM) and exercise (5 min: 1.27 +/- 0.15 mM; 15 min: 1.42 +/- 0.13 mM). Muscle glycogen degradation was significantly lower in the Intralipid trial (109.7 +/- 29.3 vs. 194.7 +/- 32.1 mmol/kg dry muscle). Muscle lactate accumulation after 15 min was similar in both trials (control, 60.7 +/- 12.2 and Intralipid, 60.9 +/- 12.4 mmol/kg dry muscle). Muscle citrate increased at rest during Intralipid (0.32 +/- 0.06 to 0.58 +/- 0.06 mmol/kg dry muscle) but was not different between trials at 3 min (control, 0.73 +/- 0.07 and Intralipid, 0.68 +/- 0.06 mmol/kg dry muscle) and 15 min of cycling. Resting acetyl-CoA was unaffected by Intralipid and increased similarly in both trials at 3 min of cycling (control, 59.0 +/- 10.3 and Intralipid, 50.7 +/- 13.6 mumol/kg dry muscle) and remained unchanged at 15 min. Pyruvate dehydrogenase activity increased five- to sevenfold during exercise and was similar in both trials (15 min: control, 2.42 +/- 0.30 and Intralipid, 2.79 +/- 0.41 mmol.min-1 x kg wet wt-1).(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1896648047 date "1993-12-01" @default.
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- W1896648047 title "Regulation of fat-carbohydrate interaction in skeletal muscle during intense aerobic cycling" @default.
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- W1896648047 doi "https://doi.org/10.1152/ajpendo.1993.265.6.e852" @default.
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