Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
RESPONSIVENESS OF PLASMA 2-HYDROXYCATECHOLESTROGEN AND 4-HYDROXYCATECHOLESTROGEN TO TRAINING AND TO GRADUATED SUBMAXIMAL AND MAXIMAL EXERCISE IN AN UNTRAINED WOMAN
Autore:
DECREE C; BALL P; SEIDLITZ B; VANKRANENBURG G; GEURTEN P; KEIZER HA;
Indirizzi:
INST GYNECOENDOCRINOL RES,DEPT APPL & EXPT REPROD ENDOCRINOL B-3000 LOUVAIN 3 BELGIUM UNIV LUBECK,INST BIOCHEM & CLIN ENDOCRINOL LUBECK GERMANY UNIV MAASTRICHT,FAC HLTH SCI,DEPT MOVEMENT SCI MAASTRICHT NETHERLANDS
Titolo Testata:
International journal of sports medicine
fascicolo: 1, volume: 19, anno: 1998,
pagine: 20 - 25
SICI:
0172-4622(1998)19:1<20:ROP2A4>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
WOMEN; N-OF-1;
Keywords:
CATECHOLAMINES; CATECHOLESTROGENS; COMT; ESTROGENS; MENSTRUAL CYCLE; WOMEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
C. Decree et al., "RESPONSIVENESS OF PLASMA 2-HYDROXYCATECHOLESTROGEN AND 4-HYDROXYCATECHOLESTROGEN TO TRAINING AND TO GRADUATED SUBMAXIMAL AND MAXIMAL EXERCISE IN AN UNTRAINED WOMAN", International journal of sports medicine, 19(1), 1998, pp. 20-25

Abstract

A single-subject experimental design was used to obtain some preliminary findings on the plasma responses of catechol-estrogens (CE) to acute exercise and brief, but exhaustive training on a cycle ergometer. One previously untrained eumenorrheic female (body fat: 26% Vover dotO(2)max: 43.3 ml.kg(-1) min(-1)) participated in this study. Resting CE levels were for ''total'' (unconjugated + conjugated) 2-hydroxyestrogens (2-OHE) 162 pg/ mi and 350 pg/ml in the follicular (FPh) and lutealphase (LPh), respectively. Plasma total 4-hydroxyestrogen (4-OHE) levels were 41 pg/ml in the FPh and 66 pg/ml in the LPh. For ''total'' 2-methoxyestrogens (2-MeOE), we found 257 pg/ml in the FPh and 374 pg/mlin the LPh. Resting levels of 2-hydroxy CE following a period of brief, intensive training were decreased during the LPh (2-OHE: -38%; 2-MeOE: -19%), whereas 4-hydroxy CE were unaffected. After training, the formation of CE as expressed by the 2-OHE:E and 4-OHE:E ratios, was increased by 75% and 200% at rest, respectively. CE activity or O-methylation, as estimated from the 2-MeOE:2-OHE ratio, was higher following training (FPh: + 22%; LPh: + 30%). During acute exercise before training, we observed a small rise proportional to the exercise intensity in the plasma ''total'' primary estrogen concentrations (FPh: + 28%; LPh:+ 16%), and no changes in either 2-OHE or 2 MeOE levels. Plasma concentrations of 4-OHE, however, doubled during maximal exercise intensity. The 2-OHE:E and 2-MeOE:2-OHE:2-OHE ratios did not alter during incremental exercise. Training effects on acute exercise responses were only noticed for 4-OHE, which contrary to pre-training conditions, now progressively decreased. The major findings of this study are that in response to training: a) during rest, a greater proportion of CE are formed from a lower amount of precursor hormone, b) the rate of O-methylation of CE increases.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 06:51:50