نتایج جستجو برای: central nervous system stimulants

تعداد نتایج: 2565169  

Journal: :Journal of applied behavior analysis 2000
S P Ardoin B K Martens

Children with attention deficit hyperactivity disorder (ADHD) are often treated with central nervous system stimulants, making the evaluation of medication effects an important topic for applied behavior analysts. Because assessment protocols emphasize informant reports and direct observations of child behavior, little is known about the extent to which children themselves can accurately report...

Journal: :Journal of applied physiology 1996
H Gillies W E Derman T D Noakes P Smith A Evans G Gabriels

This study was designed to measure whether a single dose of 120 mg pseudoephedrine ingested 120 min before exercise influences performance during 1 h of high-intensity exercise. The effects of exercise on urinary excretion of the drug were also studied. Ten healthy male cyclists were tested on two occasions, separated by at least 7 days, by using a randomly assigned, double-blind, placebo-contr...

Journal: :Journal of sports science & medicine 2009
Simon A Jobson James Hopker Andrew Galbraith Damian A Coleman Alan M Nevill

The aim of this study was to evaluate the impact of a novel crank system on laboratory time-trial cycling performance. The Rotor system makes each pedal independent from the other so that the cranks are no longer fixed at 180°. Twelve male competitive but non-elite cyclists (mean ± s: 35 ± 7 yr, Wmax = 363 ± 38 W, VO2peak = 4.5 ± 0.3 L·min(-1)) completed 6-weeks of their normal training using e...

Journal: :Journal of studies on alcohol and drugs 2011
Eduardo Romano Robert B Voas

OBJECTIVE The aim of this study was to explore the relationship of drunk and drugged driving to the occurrence of fatal crashes associated with speeding, failure to obey/yield, inattention, and seat belt nonuse. METHOD We examined data for fatally injured drivers involved in single-vehicle crashes killed in states in which more than 79% of the drivers were tested for drugs other than alcohol ...

Journal: :Endocrinology and metabolism clinics of North America 2010
Martine Duclos

Certain international sports federations are requesting that glucocorticoids (GCs) be removed from the World Antidoping Agency's list of banned products. Their arguments are based on the fact that GCs are in widespread use in sports medicine and have no demonstrated ergogenic activity. This article shows that there is scientific evidence that GCs mediate ergogenic effects in animals and humans....

Journal: :Journal of strength and conditioning research 2011
Todd A Astorino Brian J Martin Lena Schachtsiek Keau Wong Karno Ng

The primary aim of the study was to determine the efficacy of acute caffeine intake to enhance intense resistance training performance. Fourteen resistance-trained men (age and body mass = 23.1 ± 1.1 years and 83.4 ± 13.2 kg, respectively) who regularly consumed caffeine ingested caffeine (6 mg · kg(-1)) or placebo 1 hour before completion of 4 sets of barbell bench press, leg press, bilateral ...

2010
J. Segura R. Gutierrez Gallego D. Martinez M. Irie M. Ueki M. Fujita Y. Takao

Recombinant human growth hormone (rGH) has found wide-spread appliance in the sport community in the believe that it has ergogenic effect and the understanding that its (mis)use cannot be perceived by current analytical methodologies. Efforts to detect indirect evidences (biochemical markers) of rGH use are encouraging but never will be a definitive proof of the drug. Direct distinction of rGH ...

Journal: :Journal of strength and conditioning research 2008
Bülent Sökmen Lawrence E Armstrong William J Kraemer Douglas J Casa Joao C Dias Daniel A Judelson Carl M Maresh

The ergogenic effects of caffeine on athletic performance have been shown in many studies, and its broad range of metabolic, hormonal, and physiologic effects has been recorded, as this review of the literature shows. However, few caffeine studies have been published to include cognitive and physiologic considerations for the athlete. The following practical recommendations consider the global ...

2012
Chih Chin Yang

In this paper, the relationship between learning motivation and learning performance is explored by using exchange theory. The relationship is concluded that external performance can raise learning motivation and then increase learning performance. The internal performance should be not completely neglected and the external performance should be not attached important excessively. The parents n...

2014
Klaus Martin Beckmann

ADHD is a neurodevelopmental life time high prevalence disorder. Many individuals who suffer from ADHD benefit from treatment. For a significant subgroup of patients with the diagnosis ADHD, medication is important for treatment. Diagnostic criteria however as yet are not pathognomonic. A specific test to diagnose the type of ADHD that responds to medication has so far not been promoted as such...

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