normal 0 false false false en-us x-none ar-sa background: circadian rhythm sleep disorders are a presentation of sleep disorders in patients with multiple sclerosis (ms). this study aims to compare this problem in ms patients with healthy people and to determine its association with chronic fatigue in ms patients. materials and methods: a case-control study was performed on 120 ms patients and ...

purpose this study investigated the effects of time-of-day on aerobic and anaerobic performances during the yo-yo, repeated sprint ability (rsa) and the wingate tests in young soccer players. methods in a counterbalanced and a random order, twenty junior male soccer players completed the yo-yo, the rsa, and the wingate tests at two different times-of-day: 07:00 and 17:00 h. during the yo-yo tes...

introduction: depression as a disorder is relatively common in all societies several factors are involved in depression development, that shift work is one of these factors. this study compared the frequency of depression in different shifts of nurses in hospitals of yazd university of medical sciences. materials & methods: this study is a descriptive analytical study. based on statistical meth...

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 intrap...

introduction daily rhythm as one of the biological rhythms with a period of about 24 hours on various body systems and physiological responses affect on them. body temperature is a fundamental variable as one of the specifications used daily rhythms the main purpose of this study was evaluating the effect of circadian rhythms on exercise performing and physiological variants of security system ...

shiftwork is now a major feature of working life across a broad range of industries and circadian rhythms play an important role in shiftwork tolerance. so, the aim of this study was examine the relationships between age, morning-type and rigidity sleeping habits with shiftwork tolerance among shiftworkers of karun oil and gas exploitation company. the sample consisted of 295 shiftworkers of ah...

introduction: in modern societies, shift work is an essential component of daily life. since the beginning of research in shift work, researchers have been engaged in the identification of factors predicting adjustment and adaptation to shift work. the concept of adaptation and tolerance refers mainly to the biological response in terms of circadian rhythms and performance efficiency as well as...