Energy expenditure and dietary intake assessment of distance runners during training

• Main Authors: Fan-Chin Hsiao, 蕭汎津
• Other Authors: 李寧遠
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/53497696572279250857

碩士 === 輔仁大學 === 食品營養學系 === 90 === It is well established that distance runners involved in daily high intensity training at long duration must consume a high carbohydrate diet with limited energy to maintain optimal nutritional status during competitive season. The purposes of this study were to evaluate dietary intake of the elite male distance runners and determine whether energy intakes (EI) match their energy expenditures (EE) . Fourteen elite male distance runners were recruited. EI was estimated by three-day diet records. EE was determined during the same period from individual heart rate—EE ( HR/EE ) calibration curve during rest and exercise, 24 hours HR monitoring, thermic effect of food ( TEF ), and resting metabolic rate ( RMR ). Linear regression analyses were used to determine the HR/EE calibration curve for each individual. Daily EI (2805+/-472.11 kcal) was lower than daily EE (3484.2+/-353.9 kcal), resulting in energy deficits of -681.5+/-517.29 kcal. The percentage of calories from carbohydrate was found to be inadequate (56.9%), and not in accord with recommendations for endurance athletes. They did not consume adequate amounts of calcium, vitamin E, thiamin, riboflavin and niacin. It is possible that the energy deficit for distance runners was due to errors of estimating EI and EE, or suggest that they adapted to high level of activity may possess mechanisms to maintain body weight without significantly increasing EI. The results suggest that dietary intake of these distance runners was not optimal, and they should be educated on nutrition for training.