Avaliação da suplementação, do perfil nutricional e dos biomarcadores salivares em um teste de esforço em cicloergômetro com jogadores de futebol profissionais

Abstract

Salivary biomarkers have been investigated for the past 20 years. Saliva offers several advantages over other fluids in monitoring biomarkers of the body's physiological state. It is known that during exercise there is an increase in amylase and salivary protein concentrations as well as lactate and that there is a high correlation between the behavior of these curves. The objectives of this research were: 1- to evaluate the relationship between exercise, lactate production and alteration of salivary composition in terms of total proteins and salivary amylase during exercise in cycle ergometer in a load increment test; 2- compare lactate production and performance of soccer players during an exercise test after supplementation of - pure carbohydrate, creatine carbohydrate and amino acid carbohydrate; and 3- identify the dietary, anthropometric and rehydration profile of soccer players, aiming to establish the possible goals of nutritional intervention. Method: Healthy, non-smoking, professional soccer players performed a test on a load-increasing cycle ergometer. The research was based on two 30-day intervals, the first being an exercise test to determine heart rate, maximum VO2 volume and maximal load, and the second was divided into a protocol for depletion of the heart. muscle glycogen, followed by supplementation and again an exercise test. During the tests, every two minutes, blood and saliva were collected and the heart rate was evaluated. Results: In response to the first objective it was found that during exercise there was an increase in amylase and salivary protein, as well as lactate concentrations. So there is a similarity in anaerobic threshold point analyzed by salivary proteins with the blood lactate threshold. It was concluded that there was a high correlation (r = 0.95, p <0.05) between the total salivary protein threshold and the lactate threshold during physical exercise with increased load, showing saliva as a consistent alternative for anaerobic threshold assessment. consequently of athletic performance. In response to the second objective, it was found that the mean lactate values ​​of the first and second phase are statistically different (p <0.05). At the 5th minute post-test, the lactate averages between one phase and another varied according to supplementation. The group supplemented with carbohydrate and creatine had the lowest lactate averages in the second stage. This group had improved performance and lower lactate production. Regarding the third objective, it was concluded that the players presented an inadequate habitual diet in macronutrients, satisfactory anthropometric profile and water intake below the recommendations, requiring nutritional intervention aiming at behavioral changes.