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| Author(s): |
Julio Cesar Silva de Sousa
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Escola de Educação Física e Esportes (EEFE/BT) |
| Defense date: | 2022-10-19 |
| Examining board members: |
Cláudia Lúcia de Moraes Forjaz;
Eduardo Caldas Costa;
Luciano Ferreira Drager;
Maria Urbana Pinto Brandão Rondon
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| Advisor: | Cláudia Lúcia de Moraes Forjaz |
| Abstract | |
Current guidelines have included dynamic resistance training (DRT) and isometric handgrip training (IHT) as exercise modalities for the treatment of hypertension. Both of these exercises are effective to reduce clinic blood pressure, but their effects on ambulatory blood pressure, that has a better prognostic value, are unknown. Additionally, as both DRT and IHT reduces blood pressure, it is possible that their association in a combined resistance training (CRT) may produce a greater hypotensive effect, which needs to be investigated. Furthermore, blood pressure presents an expressive increase during the execution of a resistance exercise. As this increase may increase the risk for acute events in hypertensives, it is important to verified whether DRT, IHT or CRT are effective in blunting this increase. Thus, the present study was designed to evaluate the effects of DRT, IHT and CRT on ambulatory blood pressure and on the systolic blood pressure increase observed during dynamic resistance exercise and during isometric handgrip exercise in hypertensive men. For that, 60 medicated middle-aged hypertensive men were randomly allocated into four groups that trained 3 times for week during 10 weeks, following specific interventions: DRT (8 dynamic resistance exercises, 3 sets, 50% of 1RM, moderate fatigue), IHT (4 sets, 2 min, unilateral alternated isometric contraction, 30% of MVC), CRT (DRT followed by IHT) and control (CONT - 30 min, stretching exercises). Before and after the interventions, the subjects underwent an 24h ambulatory blood pressure monitoring and an experimental session designed to evaluate systolic blood pressure (SBP - photoplethysmography) increase during the execution of one-leg extension exercise (3 sets, 50% of 1RM, concentric fatigue) and isometric handgrip (4 sets, 2 min, unilateral, 30% of MVC) conducted with the same absolute and the same relative loads before and after training. Data were analysed by 2- or 3-waymixed ANOVAs followed by Newman-Keuls post-hoc tests and considering p<0.05 as significant. Twenty-four, awake and sleep blood pressure did not change in any of the four groups (P>0.05). In addition, there was no interaction with groups for SBP responses during the execution of the dynamic or the handgrip exercises, showing that all tra8ning groups presented responses similar to the CONT group. In conclusion, in medicated hypertensive men, DRT, IHT and CRT did not reduce ambulatory blood pressure and they also did not blunt SBP increase during the execution of dynamic resistance exercise or isometric handgrip exercise (AU) | |
| FAPESP's process: | 18/19151-2 - Effects of dynamic, isometric and combined (dynamic + isometric) resistance training on ambulatory blood pressure and raising of blood pressure during resistance exercise in hypertensive middle-age men |
| Grantee: | Julio Cesar Silva de Sousa |
| Support Opportunities: | Scholarships in Brazil - Doctorate |