spin a écrit :vexée après son commando féministe foireux
effectivement :Etienne a écrit :[..]
Certaines certes ... il y a tout de même quelques études, mais pas trop orientées physio, voire sport ... mais sur Pubmed, il y a une palanquée de références à la taurine
Alcohol Clin Exp Res. 2004 Sep;28(9):1408-1412.
Does an Energy Drink Modify the Effects of Alcohol in a Maximal Effort Test?
Ferreira SE, De Mello MT, Rossi MV, Souza-Formigoni ML.
BACKGROUND:: There are popular reports on the combined use of alcohol and energy drinks (such as Red Bull(R) and similar beverages, which contain caffeine, taurine, carbohydrates, etc.) to reduce the depressant effects of alcohol on central nervous system, but no controlled studies have been performed. The main purpose of this study was to verify the effects of alcohol, and alcohol combined with energy drink, on the performance of volunteers in a maximal effort test (cycle ergometer) and also on physiological indicators (oxygen uptake, ventilatory threshold, respiratory exchange rate, heart rate, and blood pressure), biochemical variables (glucose, lactate, insulin, cortisol, ACTH, dopamine, noradrenaline, and adrenaline), and blood alcohol levels. METHODS:: Fourteen healthy subjects completed a double-blind protocol made up of four sessions: control (water), alcohol (1.0 g/kg), energy drink (3.57 ml/kg Red Bull(R)), and alcohol + energy drink, each 1 week apart. The effort test began 60 min after drug or control ingestion, and the dependent variables were measured until 60 min after the test. RESULTS:: Heart rate at the ventilatory threshold was higher in the alcohol and alcohol + energy drink sessions in comparison with control and energy drink sessions. Although in comparison to the control session, the peak oxygen uptake was 5.0% smaller after alcohol ingestion, 1.4% smaller after energy drink, and 2.7% smaller after the combined ingestion, no significant differences were detected. Lactate levels (30 min after drug ingestion, 30 and 60 min after the effort test) and noradrenaline levels (30 min after the effort test) were higher in the alcohol and alcohol + energy drink sessions compared with the control session. CONCLUSIONS:: The performance in the maximal effort test observed after alcohol + energy drink ingestion was similar to that observed after alcohol only. No significant differences between alcohol and alcohol + energy drink were detected in the physiological and biochemical parameters analyzed. Our findings suggest that energy drinks, at least in the tested doses, did not improve performance or reduce alterations induced by acute alcohol ingestion.
PMID: 15365313 [PubMed - as supplied by publisher]
FASEB J. 2004 Mar;18(3):577-9. Epub 2004 Jan 20.
Taurine transporter knockout depletes muscle taurine levels and results in severe skeletal muscle impairment but leaves cardiac function uncompromised.
Warskulat U, Flogel U, Jacoby C, Hartwig HG, Thewissen M, Merx MW, Molojavyi A, Heller-Stilb B, Schrader J, Haussinger D.
Taurine is the most abundant free amino acid in heart and skeletal muscle. In the present study, the effects of hereditary taurine deficiency on muscle function were examined in taurine transporter knockout (taut-/-) mice. These mice show an almost complete depletion of heart and skeletal muscle taurine levels. Treadmill experiments demonstrated that total exercise capacity of taut-/- mice was reduced by >80% compared with wild-type controls. The decreased performance of taut-/- mice correlated with increased lactate levels in serum during exercise. Surprisingly, cardiac function of taut-/- mice as assessed by magnetic resonance imaging, echocardiography, and isolated heart studies showed a largely normal phenotype under both control and stimulated conditions. However, analysis of taut-/- skeletal muscle revealed electromyographic abnormalities. (1)H nuclear magnetic resonance spectroscopy of tissue extracts showed that in the heart of taut-/- mice the lack of taurine was compensated by the up-regulation of various organic solutes. In contrast, a deficit of >10 mM in total organic osmolyte concentration was found in skeletal muscle. The present study identifies taurine transport as a crucial factor for the maintenance of skeletal muscle function and total exercise capacity, while cardiac muscle apparently can compensate for the loss of taurine.
PMID: 14734644 [PubMed - indexed for MEDLINE]
1- Il y a qd même une sacrée différence entre les deux, à tous les niveaux : origine, principe, démarche, philosophie...Dave a écrit : D'apres ce que j'en sais la taurine ou l' homeopathie, c' est la meme chose: faut y croire pour sentir qqchose
Liberte ! Religion, homeopathie, taurine, avoir une photo de sa famille dans son porte-feuille etc .. moi j ai aucun probleme avec ca!
). Nick
Il y a souvent confusion lorsque l'on parle d'homéopathie, entre un effet placebo et un effet réel, pourquoi ?Joel a écrit :Sans rentrer dans les débats où je ne suis pas qualifié il me semble que l'homéopathie a quand même quelques références...
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