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Titolo:
ENDURANCE TRAINING, OVERTRAINING AND BAROREFLEX SENSITIVITY IN FEMALEATHLETES
Autore:
UUSITALO ALT; UUSITALO AJ; RUSKO HK;
Indirizzi:
KIHU,RES INST OLYMP SPORTS,RAUTPOHJANKATU 6 JYVASKYLA 40700 FINLAND TAMPERE UNIV HOSP,DEPT CLIN PHYSIOL TAMPERE FINLAND
Titolo Testata:
Clinical physiology
fascicolo: 6, volume: 18, anno: 1998,
pagine: 510 - 520
SICI:
0144-5979(1998)18:6<510:ETOABS>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAROTID-CARDIAC BAROREFLEX; POWER SPECTRAL-ANALYSIS; HEART-RATE; PHYSICAL-FITNESS; BLOOD-PRESSURE; EXERCISE; MEN; HUMANS; VARIABILITY; MECHANISMS;
Keywords:
AUTONOMIC FUNCTION; BLOOD PRESSURE VARIABILITY; HEART RATE VARIABILITY; PHENYLEPHRINE TEST; PLASMA VOLUME CHANGES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
A.L.T. Uusitalo et al., "ENDURANCE TRAINING, OVERTRAINING AND BAROREFLEX SENSITIVITY IN FEMALEATHLETES", Clinical physiology, 18(6), 1998, pp. 510-520

Abstract

We examined heavy training-induced changes in baroreflex sensitivity,plasma volume and resting heart rate and blood pressure variability in female endurance athletes. Nine athletes (experimental training group, ETG) increased intense training (70-90% VO2max) volume by 130% and low-intensity training (<70% VO2max) volume by 100% during 6-9 weeks, whereas the corresponding increases in six control athletes (CG) were 5% and 10% respectively. Maximal oxygen uptake (VO2max) in the ETG andCG did not change, but in five ETG athletes VO2max decreased from 53.0 +/- 2.2 (mean +/- SEM) (CI 46.8-59.2) ml kg(-1) min(-1) to 50.2 +/- 2.3 (43.8-56.6) ml kg(-1) min(-1) (P < 0.01), indicating overtraining. Baroreflex sensitivity (BRS) measured using the phenylephrine technique and blood pressure variability (BPV) did not change, but the low-frequency power of the R-R interval variability increased in the ETG (P < 0.05). The relative change in plasma volume was 7% in the ETG and 3%in the CG. The changes in BRS did not correlate with the changes in plasma volume, heart rate variability and BPV. We conclude that heavy endurance training and overtraining did not change baroreflex sensitivity or BPV but significantly increased the low-frequency power of the R-R interval variability during supine rest in female athletes as a marker of increased cardiac sympathetic modulation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 06:06:48