Effect of high-intensity interval training on the skeletal muscle of spontaneously hypertensive rats
Aleixo, Paulo Henrique; Castoldi, Robson Chacon; Souza, Francilene Lima Agostinho De; Mariano, Thaoan Bruno; Ozaki, Guilherme Akio Tamura; Garcia, Thiago Alves; Santos, Lucas Silva; Pacagnelli, Francis Lopes; Camargo, Regina Celi Trindade; Camargo Filho, José Carlos Silva.
Motriz (Online)
; 27: e1021020209, 2021. tab, graf
Artículo
en Inglés
| LILACS | ID: biblio-1287358
Abstract
Aim:
This study aimed to evaluate the effect of High-Intensity Interval Training (HIIT) on the skeletal muscle of Spontaneously Hypertensive Rats (SHR).Method:
In total, 20 male rats, SHR, 12 months old, were used, distributed into 2 groups Control Group (C) and Training Group (HIIT). The training lasted approximately 50 minutes/day, 5 days/week, for 8 weeks. Systolic blood pressure (BP) was measured at the beginning and end of the study.Analysis:
The medial gastrocnemius muscle was used to measure the smallest fiber diameter, after which the Shapiro-Wilk normality test was performed, followed by the Mann Whitney test to compare the medians and interquartile intervals (IQI) of the muscle fibers and Student t-test for performance. For analysis of BP, Analysis of Variance - ANOVA was used, followed by Tukey's post-test. All procedures adopted a significance value of 5% (p < 0.05).Results:
The median values for the variable "smallest diameter" of muscle fibers were 29.48 (IQI 9.96) µm in the C group and 33.45 (IQI 9.44) µm in the HIIT group (p < 0.05). Also, the performance was increased in the trained animal group and blood pressure values decreased significantly at the end of the experiment (p < 0.05).Conclusion:
The HIIT intensity promoted an increase in the median values of the muscle fibers and performance. Finally, a significant decrease was observed in blood pressure variation values.
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BR1.1
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