Efeitos agudos do treino aeróbico de diferentes intensidades em aspectos relacionados à imagem corporal de adultos jovens insuficientemente ativos de ambos os sexos

Abstract

Body image may be understood as the image one has about his size, shape of has own body; as well as thoughts and behavior correlated to these mentioned characteristics. The scientific literature has sought to identify the effects of some strategies capable of modulating body image aspects. This research goal is to evaluate chronic effects of the single training to responses of young adults (male/female) about their body image. This study is made up of a transversal experimental model. This sample was composed of 77 people (26 men and 51 women). The subjects were put in different groups 1) aerobic exercise between 60-70%FCmax e 2) aerobic exercise between 70-80%FCmax. The experimental protocol consisted of 30min of aerobic exercise on an ergonomic treadmill, with calculated intensity according to the selection. The research was done by self-reports; translated and validated to the study population. These reports were made at 5 stages. pre-test (pre-aerobic exercise), post-test, 24h, 48h, 72h after the exercise. For statistical analysis the sample was described by the mean and standard deviation. Cronbach's alpha coefficient was used to evaluate the internal consistency of the instruments at all times. For inferential analysis we used generalized estimation equations by adopting the covariates sex and intensity of the exercise. The results showed a significant interaction effect of protocol effect and measurement moments for the body dissatisfaction variable for the women, the protocol 60-70% HRmax obtained a lower mean score at the moment post in relation to the pre (p = 0.016, CI95%= 7,5 –0,4), and of the moment of measurement for the variable concern for muscularity, with the mean observed at the time 48h lower when compared to the moments Pre (p = 0.27, CI95%= -5, 5 – 0,2) and Post (p = 0.22, CI95%= -4.0 –0.2). The men had a significant effect of moments of measurement, for the corporal dissatisfaction, increasing with time. The 48h moment had a higher mean compared to the others, and the 72h mean lower moment compared to the post moment (p = 0.003, CI95%= -1.0 –-0.1). The results show that physical exercise has a significant effect on some negative body image variables.