Banca de QUALIFICAÇÃO: Adamor da Silva Lima

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : Adamor da Silva Lima
DATE: 23/09/2022
TIME: 08:30
LOCAL: FEF/UnB sala 47
TITLE:

"Beat-to-beat blood pressure variability after isometric handgrip training session"

KEY WORDS:

Blood pressure; Blood pressure variability; Isometric exercise.

PAGES: 24
BIG AREA: Ciências da Saúde
AREA: Educação Física
SUMMARY:

Blood pressure (BP) is determined by the function of vascular resistance and cardiac output, two variables that are controlled by the autonomic nervous system. A BP control mechanism is the arterial baroreflex, which represents a fundamental negative feedback mechanism to maintain BP homeostasis, in this sense, BP undergoes continuous fluctuations and is strictly regulated to maintain adequate perfusion of vital organs. The size and patterns that characterize these BP fluctuations define the term blood pressure variability (BPV). The term BPV encompasses a wide range of BP that occurs at different time intervals, i.e., in the very short term (i.e., beat to beat), in the short term (i.e., within a 24-hour period), or in the long term. (i.e. day to day, visit to visit or between seasons). Thus, an increase in BPV is a well-established feature of hypertension, both in animals and in humans, in this sense excessive fluctuations in blood pressure values can lead to the development of target organ damage. In this sense, to the best of our knowledge, the effect of isometric handgrip exercise on beat-to-beat blood pressure variability is not known. The aim of the study is to verify the acute effect of an isometric handgrip training session on beat-to-beat blood pressure variability in healthy young people. As a hypothesis, it is expected that a single handgrip exercise session will decrease blood pressure variability in healthy young people. The sample will consist of 40 volunteers, 20 men and 20 women. The initial 10-minute rest period will be used to stabilize cardiovascular variables, while the final 10-minute period will be used to collect baseline measurements. Subjects will complete three maximal isometric voluntary contractions (IVC), each separated by 1 min of rest, on each limb. The largest of the three maximum efforts was designated IVC. The subjects will then perform four sets of unilateral handgrip isometric exercise (two for each limb). The protocol will consist of 2-minute static contractions at 30% (experimental) or 3% (sham) MVC separated by 1-minute rest periods. Upon completion of the handgrip, seated recovery will be monitored for 30 min. Continuous beat-to-beat heart rate and arterial BP will be measured using digital photoplethysmography. Brachial arterial BP will also be measured with an automated digital sphygmomanometer for absolute BP measurements and to confirm the accuracy of the digital measurement. 

BANKING MEMBERS:
Presidente - 2101604 - LAURO CASQUEIRO VIANNA
Interno - 1794344 - RICARDO MORENO LIMA
Externo ao Programa - 2174703 - MARTIM FRANCISCO BOTTARO MARQUES