title: Intra-individual variation in energy intake in adult males in training.
abstract: Variability of energy intake was examined using data for 73 adult males (17-21 yr) for two different levels of training. The subjects were put on hard physical training costing about 1850 kcal/d (phase I: heavy activity) for the first five months and trades' training involving light physical work equivalent to 900 kcal/d (phase II: moderate activity) in the next five months. All the subjects were observed for five consecutive days of their training for dietary intake, weight, and daily activity pattern in the middle of each activity level. A subsample of nine subjects was also surveyed for five consecutive days every second month during the entire training period to get an estimate of week to week variation within subjects. 'Weigh as you eat' method in combination with proximate analysis was used to determine the habitual energy intake of the subjects. Analysis of variance for intake data showed that a substantial part (55 to 60%) of the total variance was contributed by intra-individual variation. Inter subject variation was found to have a cv of 10 per cent in both the levels of activity. Moreover data of the subsample indicated that variation in mean intake from week to week was significantly larger than the daily variance suggesting nonrandomness of daily energy intake.
authors: Maharashtra Association for the Cultivation of Science, Pune.
authors: S A
authors: SA
authors: Chiplonkar
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D004734:Energy Metabolism; D006801:Humans; D007206:Individuality; D008297:Male; D010806:Physical Education and Training / Q000379:methods; D010807:Physical Endurance