The cytokines interleukin 1 (IL 1) and interferon (IFN) are immune response modifiers that also pyrogenic somnogenic. Tumor necrosis factor (TNF) (cachectin) is another monocyte product whose production can be elicited by somnogenic agents such as endotoxin. Human recombinant TNF (rTNF), therefore, was assayed for activity. Intravenous (iv) or intracerebroventricular (ICV) injections of rTNF enhanced slow-wave sleep (SWS) electroencephalographic (0.5-4.0 Hz) Recombinant suppressed...

Previous studies investigating the impact of circadian rhythms on performance during anaerobic cycle leg exercise have yielded conflicting results. The purpose present investigation was firstly, to determine effect time day a force-velocity test ergometer (F-V) and Wingate secondly, relate any changes in rhythm oral temperature. Nineteen subjects volunteered take part study. In balanced randomized study design, were measured for maximal power (Pmax) (force-velocity test), peak (Ppeak) mean...

The purpose of this study was to evaluate the effects time day on aerobic contribution during high‐intensity exercise. A group 11 male physical education students performed a Wingate test against resistance 0.087 kg · kg−1 body mass. Two different times were chosen, corresponding minimum (06:00 h) and maximum (18:00 levels power. Oxygen uptake (V˙O2) recorded breath by (30 sec). Blood lactate concentrations measured at rest, just after test, again 5 min later. Oral temperature before each...

The purpose of this study was to determine whether delaying bedtime or advancing rising time by 4 h affects anaerobic performance individuals the following day in morning and afternoon. Eleven subjects participated study, during which we measured maximal, peak, mean powers (i.e., Pmax [force‐velocity test], Ppeak, Pmean [Wingate respectively). Measurements were performed twice daily, at 07∶00 18∶00 h, a reference normal sleep night (RN), partial deprivation timed beginning (SDB), end (SDE),...

Some muramyl peptides derived from bacterial peptidoglycan enhance slow-wave sleep (SWS). The purpose of this study was to test whether another cell wall component, lipopolysaccharide (LPS), and its lipid A moiety also have an effect on sleep. When injected intravenously, both LPS enhanced the duration SWS, increased electroencephalogram delta-wave amplitudes, suppressed rapid eye movement (REM) sleep, induced biphasic fevers. effects intravenously administered SWS were present primarily...

Human performances are highly dependent on one of the main biological rhythms, namely sleep–wake rhythm. This rhythm is driven by living clock and functional in adaptation to day–night differences environment. The athlete, like all humans, set up be awake good shape exercise during day, sleep recover night. Regular vigorous physical activity, such as light–dark cycle or social cues, can considered a zeitgeber. It has been shown reinforce synchronisation human circadian which means that...

The purpose of the present study was to examine effects active warm-up duration on diurnal fluctuations in anaerobic performances. Twelve physical education students performed a medical stress test (progressive up exhaustion) and four Wingate tests (measurement peak power [P(peak)], mean [P(mean)], fatigue index during an all-out 30 s cycling exercise). were separate sessions (minimum interval = 36 h) balanced randomized design at 08:00 18:00 h, either after 5 min (5-AWU) or 15 (15-AWU). AWU...

It has been suggested that napping is the best recovery strategy for athletes. However, researches on impacts of athletic performances are scarce. The aim this study was to determine effects a 30-min nap after partial sleep deprivation, or normal night condition, alertness, fatigue, and cognitive physical outcomes.Thirteen national-level male karate athletes were randomized experience no-nap conditions, either reference deprivation night. lasted 30 min at 1:00 PM. postnap testing session...

AbstractThe influence of time day on elbow flexion torque was studied. Thirteen physical education students, 7 males and 6 females, made maximal submaximal isometric contractions at 90° flexors using a dynamometer. The developed measured each contraction. myoelectric activity the biceps muscle also same by surface electromyography (EMG) quantified from root mean square (RMS) activity. Torque EMGs were 6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 24:00 h over day. Oral temperature before test...

Abstract The aim of this study was to determine whether there is an effect time day on the adaptation strength training at maximal effort. Fourteen participants took part in experiment. Their peak anaerobic power (Wingate test) and knee extension torque six angular velocities (1.05, 2.10, 3.14, 4.19, 5.24 6.29 rad · s -1 ) were recorded morning (between 07:00 08:00 h) evening 17:00 18:00 just before 2 weeks after a 6 week course regular training. Seven them trained only seven evening....

AbstractEleven healthy males were studied twice. On one occasion (control, C), they slept (night 1) and then underwent a battery of tests at 4h intervals from 06: 00 day 1 to 02: 2; then, after normal sleep 2), tested 10: 22: on 2. the second (sleep deprivation, SD), subjects remained awake during night 1. Each consisted measurements tympanic membrane temperature, profile mood states (POMS), muscle strength, self-chosen work rate (SCWR), perceived exertion, heart (HR) while exercising...

This study examined the effects of Ramadan fasting on anaerobic performances and their diurnal fluctuations. In a balanced randomized design, 12 subjects were measured for maximal power (Pmax; force‐velocity test), peak (Ppeak), mean (Pmean) with Wingate test at 07:00, 17:00, 21:00 h four different occasions: one week before (BR), second (SWR), fourth (ER), two weeks after (AR). There was an interval 28 between any successive tests. Oral temperature each test. Under condition, results showed...

The aim of this study was to evaluate time-of-day effects on fatigue during a sustained anaerobic cycling exercise. Sixteen healthy male competitive cyclists were asked perform 60 s Wingate test against braking load 0.087 kg.kg body mass−1 two experimental sessions, which set up either at 06:00 or 18:00 h in counterbalanced order. There only one session per day with recovery period least 36 between the sessions. Each subject trained test. mass used determine that first for each and remained...

The purpose of this investigation was to assess the effects Ramadan fasting on physical performance in youth Muslim athletes their diurnal fluctuations. In a balanced and randomized study design, 10 Tunisian junior male soccer players completed Yo-Yo intermittent recovery test level 1 (YYIRT) repeated sprint ability (RSA) at 07:00 17:00 h three different occasions: week before (BR), second (SWR) fourth (ER). There an interval 36 between any two successive tests. Oral temperature measured...

The aim of this study was to examine the time-of-day (TOD) effects in myoelectric and mechanical properties muscle during a maximal prolonged isokinetic exercise. Twelve male subjects were asked perform 50 voluntary contractions (MVC) knee extensor muscles at constant angular velocity 2.09 rad . sec(-1), 06 : 00 18 h. Torque electromyographic (EMG) parameters recorded for each contraction, ratio between these values calculated evaluate variations neuromuscular efficiency (NME) with fatigue...