Ventilatory responses to CO2 during rest and exercise were studied in 10 marathon runners and 14 untrained subjects by the rebreathing method. The average responses of the untrained subjects and athletes at rest as meausred by the slope of VE-PACO2 curves were 1.86 and 1.12 liters/min-mmHg, the difference being statistically significant (p less than 0.05). During exercise the slope of VE-PACO2 ...

The purpose of this study was to investigate muscle and tendon properties in highly trained sprinters and their relations to running performance. Fifteen sprinters and 15 untrained subjects participated in this study. Muscle thickness and tendon stiffness of knee extensors and plantar flexors were measured. Sprinter muscle thickness was significantly greater than that of the untrained subjects ...

The purpose of this study was to assess maximal aerobic power (VO2max) in trained and untrained 15-year-old boys. The trained subjects (18) were junior swimmers from a Belgrade swimming team, and the untrained ones (12) were from a Belgrade high school. VO2max was directly measured during progressive cycle ergometer exercise using open circuit spirometry. No significant differences in height, m...

The maximum speed of voice pitch changes is measured in male and female s ingers and untrained subjects. Typical differences a r e observed between each of these four groups. On the average s ingers change the pitch m o r e quickly a s compared with untrained subjects. The same observation i s made regarding female subjects a s compared with male subjects. Unlike s ingers , untrained subjects p...

objective: diabetic neuropathy leads to axonal transport abnormalities. however its mechanism and the beneficial effects of exercise on these abnormalities are not well documented. the present study aims to investigate kif1b mrna in spinal cord sensory neuron tissue of wistar male rats with diabetic neuropathy following endurance training. methods: we randomly assigned 12 male wistar rats into ...

Word sense disambiguation aims to identify which meaning of a word is present in a given usage. Gathering word sense annotations is a laborious and difficult task. Several methods have been proposed to gather sense annotations using large numbers of untrained annotators, with mixed results. We propose three new annotation methodologies for gathering word senses where untrained annotators are al...

The purpose of this study was to determine if the state of physical training influences sympathetic neural activation during acute stress in humans. We recorded muscle sympathetic nerve activity (microneurography of the peroneal nerve), arterial blood pressure, and heart rate in 12 highly trained, endurance athletes (25 ±1 years, mean±SEM) and 12 untrained subjects (27±1 years) before (supine r...

We demonstrate performance-related changes in cortical and cerebellar activity. The largest learning-dependent changes were observed in the anterior lateral cerebellum, where the extent and intensity of activation correlated inversely with psychophysical performance. After learning had occurred (a few minutes), the cerebellar activation almost disappeared; however, it was restored when the subj...