ABSTRACT
El propósito de este estudio fue investigar la relación de la composición corporal y las variables bioquímicas con el POC, así como observar la tendencia de la heredabilidad. Estudio transversal con gemelos monocigóticos y dicigóticos adultos. Para obtener los valores del POC, la prueba de ejercicio cardiopulmonar fue realizada se realizó un protocolo con sobre cinta rodante. Para la composición corporal, se utilizaron laabsorciometríade energía dual y la antropometría. Para las inferencias, se realizaron la concordancia de Spearman y la prueba de hipótesisMann-Whitney.Los resultados mostraron que lasvariables de composición corporal no se correlacionaron significativamente con el punto óptimo cardiorrespiratorio. El Punto Óptimo Cardiorrespiratorio y las variables bioquímicas en general demostraron una mayor tendencia a ser influenciados por factores ambientales. El comportamiento de las variables de composición corporal demostró una mayor influencia de la heredabilidad. (AU)
The purpose of this study was to investigate the relationship of body composition and biochemical variables with the cardiorespiratory optimal point, as well as to observe the tendency of heritability. This is a descriptive study with a cross-sectional design with adult monozygotic and dizygotic twins. To obtain the COP values, the cardiopulmonary exercise test was performed using a treadmill ramp protocol. For body composition, dual energy absorptiometry and anthropometry were used. For inferences, the Spearman correlation and the Mann-Whitney hypothesis test were performed. The results showed that the body composition variables did not significantly correlate with the cardiorespiratory optimal point. The Cardiorespiratory Optimal Point and biochemical variablesdemonstrated a greater tendency to be influenced by environmental factors and the body composition variables showed a greater influence of heritability. (AU)
Subject(s)
Humans , Male , Female , Young Adult , Adult , Body Composition , Twins, Dizygotic , Biochemistry , Surveys and Questionnaires , Cross-Sectional Studies , AnthropometryABSTRACT
BACKGROUND: Rating of Perceived Exertion (RPE) is a subjective scale to monitor overload and fatigue during exercise. Hypoxia may worsen the perception of fatigue, compromising the self-reported perception of effort and increasing RPE. The objective was to evaluate the effects of carbohydrate (CHO) supplementation on RPE during exercise in hypoxia simulating 4200 m. METHODS: Eight male physically active volunteers performed two exercises at 50% VO2peak and 1% slope: exercise in hypoxia + placebo or exercise in hypoxia + CHO (6% maltodextrin) with supplementation at 20, 40, and 60 min during exercise. Oxygen Saturation (SaO2%) was assessed at baseline and after exercise, while RPE and HR were measured each 10 min during the trial. RESULTS: SaO2% decreased after exercise in both conditions of hypoxia compared to rest. The RPE did not differ between groups. However, the RPE increased in hypoxia after 20 min of exercise in relation to 10 min. The Area Under the Curve (AUC) of RPE was lower in hypoxia + CHO compared to hypoxia. The AUC of the HR/RPE ratio in the hypoxia + CHO group was higher in relation to hypoxia. CONCLUSIONS: Our results indicate that CHO supplementation does not change RPE induced by 60 min of exercise at 50% VO2peak in hypoxia equivalent to 4200 m at the different times analyzed. However, in hypoxia + CHO the (AUC)-60 min of total RPE decreased during exercise, while the heart rate/RPE ratio improved, indicating lower RPE in the hypoxic environment.
