Effect of isometric contraction duration on hemodynamic responses in hypertensive women
Original article - e235584 - Published 2024 Abr 3
DOI:
https://doi.org/10.33233/rbfex.v23i1.5584Keywords:
isometric exercise, blood pressure, hypertensionAbstract
Introduction: Isometric exercise (IE) is one of the non-pharmacological strategies for reducing post-exercise blood pressure measurements. Objective: To compare the acute effect of two protocols with different configurations of isometric exercise prescription on hemodynamic parameters in hypertensive women. Methods: Ten hypertensive women performed 2 sessions of IE at 30% of 1RM on the horizontal bench press with a guided bar. The protocols were: 4 sets of 2 minutes of isometric contraction with 2 minutes of rest (4x2x2); and 16 sets of 30 seconds of isometric contraction with 24 seconds of rest (16x30x24), with a 7-day interval between sessions. Blood pressure was measured using a digital sphygmomanometer, pre-exercise, immediately after exercise, and during the 60-minute recovery period. Results: Both protocols showed an increase in heart rate and double product (4x2x2, p = 0.002 and p < 0.001; 16x30x24, p = 0.001 and p = 0.002, respectively). Protocol 4x2x2 increased systolic blood pressure and mean arterial pressure (p = 0.014 and p = 0.034, respectively), while 16x30x24 increased pulse pressure (p < 0.001) compared to rest immediately after exercise. Normalization of the evaluated values was observed from 10 minutes of recovery in both protocols. There was no interaction effect between the protocols. Conclusion: Isometric exercise for the upper limbs with different configurations (4x2x2 and 16x30x24), when equalized by work-to-rest ratio, promotes similar acute hemodynamic responses in controlled hypertensive women.
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Copyright (c) 2024 Leudyenne Pacheco de Abreu, Carlos Brendo Ferreira Reis, Thiago Gomes Leite, Cristiano Teixeira Mostarda, Richard Diego Leite, Mário Alves de Siqueira-Filho
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