Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Beta-endorphin immunoreactivity during high-intensity exercise with and without opiate blockade
Autore:
Angelopoulos, TJ;
Indirizzi:
Univ Cent Florida, Exercise Physiol Lab, Coll Educ, Orlando, FL 32816 USA Univ Cent Florida Orlando FL USA 32816 , Coll Educ, Orlando, FL 32816 USA
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 1, volume: 86, anno: 2001,
pagine: 92 - 96
SICI:
1439-6319(200111)86:1<92:BIDHEW>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENDOGENOUS OPIOIDS; GONADOTROPIN-SECRETION; LIPOTROPIN RELEASE; TREADMILL EXERCISE; HORMONE; MALES; CATECHOLAMINES; INCREASES; RESPONSES; CORTISOL;
Keywords:
beta-endorphin; naloxone; placebo; exercise; man;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Angelopoulos, TJ Univ Cent Florida, Exercise Physiol Lab, Coll Educ, ED 214, Orlando, FL 32816 USA Univ Cent Florida ED 214 Orlando FL USA 32816 L 32816 USA
Citazione:
T.J. Angelopoulos, "Beta-endorphin immunoreactivity during high-intensity exercise with and without opiate blockade", EUR J A PHY, 86(1), 2001, pp. 92-96

Abstract

Nine highly fit men [mean (SE) maximum oxygen uptake, (V) over dotO(2max):63.9 (1.7) ml.kg(-1).min(-1); age 27.6 (1.6)years] were studied during twotreadmill exercise trials to determine plasma beta -endorphin immunoreactivity during intense exercise (80% (V) over dotO(2max)). A double-blind experimental design was used, and subjects performed the two exercise trials incounterbalanced order. Exercise trials were 30 min in duration and were conducted 7 days apart. One exercise trial was undertaken following administration of naloxone (1.2 mg: 3 cm(3)) and the other after receiving a placebo(0.9% NaCl saline; 3 cm(3)). Prior to each experimental trial. a flexible catheter was placed into an antecubital vein and baseline blood samples were collected. Thereafter, each subject received either a naloxone or placebobolus injection. Blood samples were also collected after 10, 20 and 30 minof continuous exercise. beta -Endorphin was higher (P < 0.05) during exercise when compared to preexercise in both trials. However. no statistically significant difference was found (P > 0.05) between exercise time points within either experimental trial. beta -endorphin immunoreactivity was greater (P < 0.05) in the naloxone than in the placebo trial during each exercisesampling time point [10 min: 63.7 (3.9) pg.ml(-1) vs 78.7 (3.8) pg.ml(-1),20 min: 68.7 (4.1) pg.ml(-1) vs 83.8 (4.3) pg.ml(-1); 30 min: 71.0 (4.3) pg.ml(-1) vs 82.5 (3.2) pg.ml(-1)]. These data suggest that intense exerciseinduces significant increases in beta -endorphin that are maintained over time during steady-rate exercise. Exercise and naloxone had an interactive effect on beta -endorphin release that warrants further investigation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 09:58:52