Efeitos agudos da isquemia pré-condicionante no desempenho intermitente de atletas recreacionalmente treinados

Abstract

Introduction: Several factors influence sports performance, as well as performance maintenance. For this, ergogenic resources have been implemented in the training routines of athletes, in order to optimize performance. Preconditioning Ischemia (IPC) has been used to promote acute physiological and neuromuscular adaptations to improve performance. In addition, it is known that a cascade of metabolic events occurs as a result of the stress generated by the protocol. Considering that in order to improve performance, it is necessary to make sharp adjustments to the metabolic level of individuals, CPI may be relevant to improve physical performance. Objectives: To evaluate the acute effects of CPI on physiological parameters such as blood pressure (BP), heart rate (HR), heart rate variability (HRV) and blood lactate concentration ([LAC]), and on hemodynamic parameters as a potential hydrogen (pH), partial pressure of oxygen (pO2), partial pressure of carbon dioxide (pCO2), total concentration of carbon dioxide (TCO2), excess base (BE), oxygen saturation (sO2) and bicarbonate ions ( HCO3-). Materials and Methods: Young men, physically active, were recruited. They visited the laboratory to be evaluated during a preconditioning ischemia protocol, which consists of three series of 5 minutes of blood flow occlusion interspersed with 5 minutes of reperfusion. The occlusion pressure was established at 220 mmHg. Initially, anamnesis and anthropometric evaluation were performed. Subsequently, the subject was put to rest for 20 minutes to measure baseline parameters and immediately at the end, the experimental protocol was started. mmediately after the IPC protocol, the subjects remained at rest to measure the physiological and hemodynamic variables. Measurements of physiological variables were performed before the intervention, during the intervention and after the intervention. The main physiological parameters evaluated were: heart rate, heart rate variability and blood lactate concentration. Hemodynamics: pH PCO2, pO2, TCO2, HCO3-, BE and sO2. Results: The IPC protocol promoted positive acute effects regarding HRV, promoting greater activation of the parasympathetic system. An increase in HR and [LAC] was observed, indicating an increase in the contribution of the glycolytic system. Conclusion: IPC can be easily applied, emphasizing that it consists of a safe protocol, which acutely improves heart rate variability efficiently, as well as making the organism metabolically prepared for practical applications that influence human performance variables.