Indications with respect to parasympathetic nervous activity in vivo can be obtained only by means of indirect parameters. Ten elderly athletes were compared to 10 sedentary healthy peers, in order to evaluate blood pressure (BP) and heart rate (HR) circadian change and variability, as assessed by ambulatory 24-h non-invasive monitoring. Such comparison proved that the elderly athletes have a significantly lower value in: systolic 24-h BP; systolic and diastolic 24-h BP variability; systolic and diastolic day-time BP variability; systolic night-time BP variability; 24-h, day-time and night-time mean HR, as well as HR variability. Prolonged physical training improves, therefore, the parasympathetic control on the cardiovascular system in the elderly, which causes a low BP, HR, and a low related variability. Regular exercise induces a shift in the sympathetic:parasympathetic tone ratio towards a stronger parasympathetic influence. Such a neurovegetative tone seems to confer juvenile characteristics to the cardiovascular system of elderly athletes. (C) 1997 Elsevier Science Ireland Ltd.
|Autori interni:||GALETTA, FABIO|
|Autori:||Prattichizzo FA; Galetta F|
|Titolo:||Ambulatory blood pressure pattern in elderly athletes|
|Anno del prodotto:||1997|
|Digital Object Identifier (DOI):||10.1016/S0167-4943(96)00758-3|
|Appare nelle tipologie:||1.1 Articolo in rivista|