26Although meta-analyzes point to a weight loss of no more than 3 kg to exercise, body 27 fat of the athletes are below of the population. Then training load may be a determining factor 28 in body composition. This study verified if dose of physical training adopted by exercise 29 practitioners is determinant in body composition. Was a cross-sectional retrospective study 2 30 carried out with 122 individuals (45.8 ± 13.0 years, 50 men) who practiced cyclic exercises 31 (running, walking or cycling) randomly recruited in six regions which the city was 32 geographically divided. Caloric expenditure was estimated in the trainings based on the 33 frequency, intensity and duration of the exercises and the body composition was assessed by 34 electrical bioimpedance. The subjects practiced 4.3 ± 1.5 weekly sessions, with mean duration 35 of 56.7 ± 28.2 minutes/session and caloric expenditure/day of 410.2 ± 384.1 kcal/day. Linear 36 regression test revealed a negative correlation (p=0.000) between the mean daily expenditure 37 and all measures of adiposity tested (absolute and relative body fat and visceral fat), and 38 evidenced that the training load explains 56% of the proposed model. When adjusted for sex, 39 the correlation remained in men and disappeared in women. Men´s with energy expenditure 40 higher than 785 kcal/day presented lower fat stores than congeners with minor diary training 41 load. Conclude that training load adopted by physical exercise practitioners is an influencing 42 factor in the body composition of men, but not of women. Load adopted in conventional 43 programs training seems insufficient to produce adequate body composition. 44 45 Key-words: weight loss, body fat, body composition, caloric expenditure, exercise.46 47 3 53 3 kg of fat mass after program training of the 3 and 5x / week, with sessions of 45 to 60 54 minutes. 55 Among some attempts to explain the resistance to exercise-induced weight loss, the 56 literature reports possible mechanisms that act as a compensatory adaptation of the organism 57 that includes reduction of basal metabolism in people who perform exercises [7], increased 58 nutrient intake [8], oxidative stress [9], hyperinsulinemia [10] and genetic profile [11]. 59Despite these compensation mechanisms, athletes present body fat percentage below 60 of the normal range (11 to 16% for men and 14 to 18% for women) [12,13]. Considering that 61 athletes can spend between 2226 a 3877 kcal/day [14][15][16], it is plausible to assume that a high 62 training load outweighs the compensation mechanisms that limit weight loss in community 63 training programs, in which people exercise only 3 to 5 times a week and spend between 400 64 and 600 Kcal per session [5,17]. 65Although it seems obvious, this relationship between training load and body 66 composition is not determined. Previous intervention studies did not adopt different training 67 loads to verify a possible greater efficacy of the programs with greater dose of exercise. 68Similarly, as far as we know, there are no studi...
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