منابع مشابه
Circadian variation in swim performance.
Previous findings of time-of-day differences in athletic performance could be confounded by diurnal fluctuations in environmental and behavioral "masking" factors (e.g., sleep, ambient temperature, and energy intake). The purpose of this study was to examine whether there is a circadian rhythm in swim performance that is independent of these masking factors. Experienced swimmers (n = 25) were a...
متن کاملDiurnal variation in swim performance remains, irrespective of training once or twice daily.
PURPOSE Fast swim times in morning rounds are essential to ensure qualification in evening finals. A significant time-of-day effect in swimming performance has consistently been observed, although physical activity early in the day has been postulated to reduce this effect. The aim of this study was to compare intradaily variation in race-pace performance of swimmers routinely undertaking morni...
متن کاملCIRCADIAN VARIATION OF THE ACUTE TOXICITY AND NOCICEPTIVE ACTIVITY OF AMINOPHYLLINE IN MICE
The circadian variation of the toxicity and nociceptive actIvity of aminophylline as an important methylxanthine was studied in mice. The animals were housed under controlled light-dark cycles for at least 2 weeks. Acute toxicity was determined by LD50. Hot-plate test was used for determination of thermal pain threshold. Doses of 200, 250, 280 and 340 mg/kg of aminophylline were injected i...
متن کاملCircadian variation in ischemic threshold. A mechanism underlying the circadian variation in ischemic events.
BACKGROUND There is a circadian pattern in the occurrence of cardiac events in patients with coronary artery disease. Whether changes in coronary vascular tone contribute to these phenomena is unknown. We measured the ischemic threshold, defined as either the heart rate or rate-pressure product at 1-mm ST segment depression during treadmill exercise and used it as an index of the lowest coronar...
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ژورنال
عنوان ژورنال: Medicine & Science in Sports & Exercise
سال: 2006
ISSN: 0195-9131
DOI: 10.1249/00005768-200605001-01877