Pyruvate dehydrogenase (PDH) plays a key role in the regulation of skeletal muscle substrate utilization. IL-6 is produced in skeletal muscle during exercise in a duration dependent manner and has been reported to increase whole body fatty acid oxidation, muscle glucose uptake and decrease PDHa activity in skeletal muscle of fed mice. The aim of the present study was to examine whether muscle I...

We tested a new portable metabolic system, the Jaeger Oxycon Mobile (OM) at a range of running speeds. Six subjects carried out, in random order, two incremental tests on a treadmill, one of them using the OM, and the other using the Jaeger Oxycon Pro (OP). There are systematic errors in the measurements of oxygen consumption (VO2) and respiratory exchange ratio (RER) with the OM. Production of...

a r t i c l e i n f o JEL classification: C12 C22 C32 F30 F31 Keywords: Fractional Integration Nonlinear modelling Mean reverting process Long-memory process This paper examines the time series behavior of monthly bilateral real exchange rates (RER) on a comprehensive sample of 78 industrialized and developing countries, using the US Dollar, the UK Pound and the German Deutsche Mark as numerair...

To evaluate the hypothesis that endurance training increases intramuscular triglyceride (IMTG) oxidation, we studied leg net free fatty acid (FFA) and glycerol exchange during 1 h of cycle ergometry at two intensities before training [45 and 65% of peak rate of oxygen consumption (V˙o 2 peak)] and after training [65% pretrainingV˙o 2 peak, same absolute workload (ABT), and 65% posttrainingV˙o 2...

Abstract Introduction Time-restricted eating (TRE) is a dietary strategy in which energy consumed over 6-10h window during the day and associated with reduced intake subsequent weight loss people obesity. However, impact of isocaloric TRE on obesogenic factors such as hormones related to hunger appetite, well expenditure metabolic rate relatively unknown. We therefore investigated 1 week obesit...

Hormone-sensitive lipase (HSL) catalyzes the hydrolysis of intramuscular triacylglycerol (IMTG); however, its regulation in skeletal muscle is poorly understood. To examine the effects of reduced free fatty acid (FFA) availability on HSL activity in skeletal muscle during aerobic exercise, 11 trained men exercised at 55% maximal O2 uptake for 40 min after the ingestion of nicotinic acid (NA) or...

CONTEXT Obesity is associated with altered patterns of substrate utilization at rest and during exercise. OBJECTIVE The relationship between obesity and fat oxidation during recovery from exercise was examined. HYPOTHESIS The postexercise shift toward fat oxidation is blunted in the obese state, reflected by higher respiratory exchange ratio (RER), blunted GH, and increased cortisol values ...

Several methods are used for estimating the anaerobic threshold (AT) during exercise. The aim of the present study was to compare AT values based on blood lactate measurements with those obtained from computerised calculations of different respiratory gas indices. Twelve healthy, well-trained men performed a stepwise incremental test on both treadmill and cycle ergometer. Respiratory gases were...

although sport-physiologists have repeatedly analyzed respiratory gases through exercise, it is relatively new in the cardiovascular field and is obviously more acceptable than standard exercise test, which gives only information about the existence or absence of cardiovascular diseases (cvds). through the new method of exercise test, parameters including aerobic and anaerobic are checked and m...