Unit:
Κατεύθυνση ΕργοφυσιολογίαLibrary of the School of Physical Education and Sport Science
Author:
Ntalapera Spyridoula
Supervisors info:
Γελαδάς Νίκος, Καθηγητής, ΣΕΦΑΑ, ΕΚΠΑ
Κοσκολού Μαρία, Αναπληρώτρια Καθηγήτρια, ΣΕΦΑΑ, ΕΚΠΑ
Δόντη Ολύβια, Επίκουρη Καθηγήτρια, ΣΕΦΑΑ, ΕΚΠΑ
Original Title:
Ρύθμιση της αρτηριακής πίεσης κατά την ισομετρική άσκηση αθλητών ενοργάνου γυμναστικής και φυσικά δραστήριων ατόμων
Translated title:
Arterial blood pressure regulation during isometric exercise between artistic gymnastics athletes and physically active individuals
Summary:
Introduction: Arterial blood pressure is determined by cardiac output and total peripheral resistance. During static exercise, diastolic blood pressure is disturbed because of increases in total peripheral resistance. It is unknown whether artistic gymnastics athletes who are exposed to prolonged static exercise daily are able to control their blood pressure differently than physically active individuals unaccustomed to isometric training.
Objective: The purpose of the study was to investigate the mechanism of arterial blood pressure during prolonged static exercise at different intensities (3min at 30% & 50% MVC) and to record the blood pressure response in these athletes at very high intensities until exhaustion (80% & 100%MVC).
Methods: Fourteen young males, 7 international level artistic gymnastics athletes and 7 physically active individuals without resistance training history, performed the experimental protocol in four different days following a randomized and counterbalanced order. The two prolonged exercise protocols consisted of 15min resting period followed by 3min of static exercise performed either at 30%MVC or at 50%MVC and 10min of recovery period. The two exercise protocols until exhaustion consisted of 15min resting period followed by either 80%MVC or 100% MVC until exhaustion and 10min recovery. A 3-way ANOVA RM (group x exercise intensity x time) was conducted. The level of significance was set at p≤0.05.
Results: During the resting period, arterial blood pressure was normal for the 2 groups; however, baroreflex sensitivity in athletes was higher than in physically active individuals (p<0.05). During prolonged static exercise (50% MVC), the increase of blood pressure was lower in athletes than in controls (p<0.05). Also, baroreflex sensitivity was higher in athletes than controls during static exercise at 50%MVC. In the other exercise conditions there were no differences between groups.
Discussion: Artistic gymnastics athletes seem to have the ability to control their blood pressure differently and maintain it to lower levels during isometric exercise compared to physically active individuals. The higher baroreflex sensitivity they exhibit already at rest enables them to regulate blood pressure during exercise more effectively.
Main subject category:
Education - Sport science
Keywords:
isometric exercise, blood pressure, baroreflex sensitivity, artistic gymnastics
