Resumo Objetivou-se verificar a influência da composição corporal na CAER de animais submetidos a diferentes tipos de treino físico. Foram utilizados 23 ratos Wistar, divididos em grupos de acordo com o protocolo de treino: controle (CTLE); treino aeróbio (TAE); treino anaeróbio (TAN); e treino físico concorrente (TCc). Foi realizado o Teste de carga crítica (CC) para a determinação do limiar anaeróbio no início e no final do período de treino. O TAE foi composto por exercício de natação com intensidade correspondente a 70% do Limiar Anaeróbio; o TAN por meio de saltos aquáticos com sobrecarga de 50% do peso corporal de cada animal; e o TCc pela combinação dos protocolos aeróbio e anaeróbio, descritos anteriormente. Após quatro semanas de treino, foi coletado e mensurado o peso do tecido adiposo epididimal e dos músculos sóleo, plantar e gastrocnêmio. Foi utilizada a análise de dispersão para a elaboração e gráficos e a análise do modelo de regressão linear simples para identificar a interferência de cada uma das variáveis na CAER. A Gordura Corporal demonstrou influência positiva de 5% na relação com o Limiar Anaeróbio. Os músculos sóleo e gastrocnêmio mostraram influência negativa de 13,1% e 37,0%, respectivamente. Enquanto o músculo plantar não mostrou qualquer influência no limiar anaeróbio. A composição corporal influenciou na CAER dos animais analisados. Além disso, notou-se que a gordura corporal favoreceu a flutuabilidade, enquanto a maior massa muscular a prejudicou.

Abstract The aim of this study was to verify the influence of body composition on the CAER of animals submitted to different types of physical training. Twenty-three Wistar rats were divided into groups according to the training protocol: control (CTLE); aerobic training (TAE); anaerobic training (TAN); and concurrent physical training (TCc). The critical load test (CC) was carried out for determining the anaerobic threshold at the beginning and end of the training period. TAE was composed of swimming exercise with intensity corresponding to 70% of the anaerobic threshold; TAN was composed of water jumps with overload of 50% of the body weight of each animal; and TCc was composed of a combination of aerobic and anaerobic protocols described above. After four weeks of training, the weight of epididymal adipose tissue and soleus, plantar and gastrocnemius muscles was collected and measured. Dispersion analysis was used to draw graphics and analysis of the simple linear regression model was performed to identify the influence of each variable on CAER. Body Fat demonstrated positive influence of 5% on the relationship with the Anaerobic Threshold. Soleus and gastrocnemius muscles showed negative influence of 13.1% and 37.0%, respectively. The plantaris muscle showed no influence on the Anaerobic Threshold. Body composition influenced the CAER of the animals analyzed. Moreover, it was verified that body fat favored floatability, while higher muscle mass impaired it.

In this paper, we introduce a Bayesian analysis for a bivariate generalized exponential distribution in the presence of censored data and covariates derived from Copula functions. The generalized exponential distribution could be a good alternative to analyze lifetime data in comparison to usual existing parametric lifetime distributions as Weibull or Gamma distributions. We have being using standard existing MCMC (Markov Chain Monte Carlo) methods to simulate samples for the joint posterior of interest. Two examples are introduced to illustrate the proposed methodology: an example with simulated bivariate lifetime data and an example with a real lifetime data set.