Nami K. Takano

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Differential effects of uphill and downhill running on phase relation between locomotor and respiratory cycles were studies in nine experienced runners who were instructed to run uphill and downhill on a sloped surface at comfortable and constant speeds (actually 1.7-4.4 m s-1). Timings of footstrike and onsets of inspiration and expiration were measured to(More)
The conscious entrainment of respiratory rhythm to exercise rhythm (ENT) has been hypothesized to alleviate breathing discomfort and reduce the oxygen (O2) cost of ventilation with a resulting decrease in total O2 uptake (VO2) during rhythmic exercise. This hypothesis has been tested in the study reported here. Eight female subjects performed cycle exercise(More)
Ventilatory response after 1 min of voluntary hyperventilation (HV) was studied in 10 healthy women. Before, during, and after HV, end-tidal PCO2 (PETCO2) was maintained at a given level between resting and 60 Torr. After cessation of HV, hyperpnea was seen in 179 out of a total of 195 runs but in the remaining 16 runs in 3 subjects hypopnea occurred, both(More)
BACKGROUND AND OBJECTIVES Reactive oxygen species (ROS) mediate various signaling pathways that underlie vascular inflammation in atherogenesis and cardiovascular diseases. Cardiac rehabilitation (CR) has a variety of multiple beneficial effects, including anti-inflammatory effects. The purpose of the present study was to investigate the effects of CR on(More)
We evaluated whether frequency analysis could detect the development of interstitial fibrosis in rats. SHR/Izm and age-matched WKY/Izm were used. Limb lead II electrocardiograms were recorded. Continuous wavelet transform (CWT) was applied for the time-frequency analysis. The integrated time-frequency power (ITFP) between QRS complexes was measured and(More)
Incremental cycle exercise was performed by 17 subjects under two breathing conditions: spontaneous breathing (Non-ENT run) and deliberate entrainment of breathing frequency (f) to cycling rate at preferred coupling ratios up to possibly high work rates (ENT run). The purpose was to investigate the influence of entrainment on two non-invasive determinations(More)
Fourteen subjects performed cycle exercise at work loads of 0 and 1 kp, each for 3 min, during which the pedal rate was kept constant by various external cues. Six cues were used in order: no cue (N1), a speedometer dial (S), a flashing light (F), a verbal command (V), a metronome sound (M) and no cue, again (N2). An attempt was to study the effect of these(More)
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