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Titolo:
BAROREFLEX FUNCTION AND CARDIAC STRUCTURE WITH MODERATE ENDURANCE TRAINING IN NORMOTENSIVE MEN
Autore:
MCDONALD MP; SANFILIPPO AJ; SAVARD GK;
Indirizzi:
QUEENS UNIV,SCH PHYS & HLTH EDUC KINGSTON K7L 3N6 ONTARIO CANADA QUEENS UNIV,SCH PHYS & HLTH EDUC KINGSTON K7L 3N6 ONTARIO CANADA HOP HOTEL DIEU,DEPT CARDIOL KINGSTON K7L 5G2 ON CANADA
Titolo Testata:
Journal of applied physiology
fascicolo: 5, volume: 74, anno: 1993,
pagine: 2469 - 2477
SICI:
8750-7587(1993)74:5<2469:BFACSW>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
FOREARM VASCULAR-RESISTANCE; BODY NEGATIVE-PRESSURE; HEART-RATE REFLEX; PLASMA-VOLUME; RED-CELL; EXERCISE; HUMANS; HYPERTENSION; RESPONSES;
Keywords:
CAROTID BAROREFLEX; CARDIOPULMONARY; SPONTANEOUS BAROREFLEX; PARASYMPATHETIC; EXERCISE TRAINING; ARTERIAL PRESSURE; HEART RATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
M.P. Mcdonald et al., "BAROREFLEX FUNCTION AND CARDIAC STRUCTURE WITH MODERATE ENDURANCE TRAINING IN NORMOTENSIVE MEN", Journal of applied physiology, 74(5), 1993, pp. 2469-2477

Abstract

Changes in arterial and cardiopulmonary baroreflex function and cardiac structure were followed throughout 10 wk of moderate endurance training [60 min of cycling, 3 days/wk, 60% maximal O2 uptake (VO2max)] insedentary normotensive men (22-34 yr old). Subjects were randomly assigned to an exercise training group (ET; n = 9) or to a control group (UT; n = 4). Decreases in resting heart rate (8.9 +/- 2.6%, P < 0.01) and mean arterial pressure (7.0 +/- 2.3%, P < 0.05) and an increase inVO2max occurred after 10 wk in ET. An increase in the gain or slope of the spontaneous baroreflex response at rest was found after 10 wk inET (50.1 +/- 6.3%, P < 0.01) but not in UT. An upward shift in the resting carotid-cardiac baroreflex response curve also occurred after 10wk in ET, although the maximum range and gain of the response and thevagally mediated peak reflex sinus node responses were unchanged. Cardiopulmonary baroreflex function (reflex changes in forearm vascular conductance) and measured indexes of left ventricular structure were not altered in either ET or UT, although peak transmitral inflow velocity increased in ET (P < 0.05). These findings demonstrate that moderateexercise training results in an enhancement in the ability to reflexly adjust heart rate with spontaneous changes in arterial pressure within the operating range. This occurs independently of any changes in carotid-cardiac baroreflex function over the full response range in cardiopulmonary baroreflex function or in cardiac structure.

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Documento generato il 27/11/20 alle ore 02:18:41