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Titolo:
Exercise and recovery responses of adrenal medullary neurohormones to heavy resistance exercise
Autore:
Bush, JA; Kraemer, WJ; Mastro, AM; Triplett-McBride, NT; Volek, JS; Putukian, M; Sebastianelli, WJ; Knuttgen, HG;
Indirizzi:
Ball State Univ, Human Performance Lab, Muncie, IN 47306 USA Ball State Univ Muncie IN USA 47306 Performance Lab, Muncie, IN 47306 USA Penn State Univ, Dept Kinesiol, University Pk, PA 16802 USA Penn State Univ University Pk PA USA 16802 l, University Pk, PA 16802 USA Pennniversityiv, Dept Biochem & Mol Biol, Ctr Sports Med, Lab Sports Med, U Penn State Univ University Pk PA USA 16802 Sports Med, Lab Sports Med, U
Titolo Testata:
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
fascicolo: 4, volume: 31, anno: 1999,
pagine: 554 - 559
SICI:
0195-9131(199904)31:4<554:EARROA>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROENKEPHALIN PEPTIDE-F; GROWTH-FACTOR RESPONSES; GRADED-EXERCISE; REST;
Keywords:
proenkephalin; opioid peptides; resistance exercise;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Kraemer, WJ Ball State Univ, Human Performance Lab, Muncie, IN 47306 USA Ball State Univ Muncie IN USA 47306 Lab, Muncie, IN 47306 USA
Citazione:
J.A. Bush et al., "Exercise and recovery responses of adrenal medullary neurohormones to heavy resistance exercise", MED SCI SPT, 31(4), 1999, pp. 554-559

Abstract

Purpose: The purpose of this study vas to examine the effect of dynamic resistance exercise on the response patterns of adrenal medullary neurohormones in strength-trained men. Methods: Ten strength-trained men (21.7 +/- 0.58 yr) gave informed consent and performed two resistance exercise protocols, high force and high power, of equal total work in a randomized order separated by 1 wk. Blood samples were obtained pre-exercise (baseline), 0 (R-0), 15 (R-15), and 240 (R-240) min postexercise and under resting control conditions for each time point. Results: There were no significant differencesin control concentrations for each time point and no difference in pre-exercise values between the two resistance exercise protocols for plasma lactate, epinephrine, plasma peptide F (P-F), or norepinephrine (NE). Plasma lactate significantly (P less than or equal to 0.05) increased from baseline for both protocols; however, concentrations were higher in response to the high force protocol. Plasma epinephrine was significantly increased from baseline at R-0 and returned to baseline at R-15 for both protocols. In contrast, plasma P-F was significantly decreased at R-0 from baseline; however, at R-240 P-F had significantly increased to >80% baseline for both protocols. Conclusions: These results indicate that the adrenal medulla was activated in response to the acute stress of both types of heavy resistance exercise. Furthermore, during longer recovery periods, the adrenal medulla was also active above baseline conditions as increased concentrations of proenkephalin fragments (i.e., P-F) were detected in the circulation.

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Documento generato il 19/09/20 alle ore 09:11:05