日本人自転車ロード選手を対象に軽負担な炭水化物ローディングを実施した事例報告

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タイトル別名
  • ニホンジン ジテンシャ ロード センシュ オ タイショウ ニ ケイフタン ナ タンスイカブツ ローディング オ ジッシ シタ ジレイ ホウコク
  • A Case Report on Modified Carbohydrate Loading for Japanese Amateur Road Racing Cyclist

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Athletes are usually aware of how important it is to load carbohydrate to get into shape for a competition, but the intake by each athlete will vary depending on race, gender, daily practice, meal content, the capability of digestive absorption, etc. Therefore, it is important for each athlete to establish their own style of nutrition intake, especially Japanese road racing cyclists, who are little known and are few in Japan. They have little practical nutritional or scientific performance data available for their road race performance. The aim of this research was to confirm the nutritional intervention (carbohydrate loading) on a cycle road racer living in southern Nagano prefecture, Japan. Before the survey, his weight, body fat, and basal metabolic rates were measured. His physical activity level (PAL) was also measured by writing down the racer's physical activity for 24 hours. Based on all those results, carbohydrate loading was practiced using modified Sherman's system. Since the racer often goes for a long bike ride and/or on a road trip, which made it difficult for us to serve him a nutrient-rich meal three times a day, we decided to serve him a healthy meal for either breakfast or dinner for a total of eight days. The menu included a bowl of soup and three kinds of simple dishes (a Japanese traditional course meal), milk, and fruit. During four days of soft training, the average of his energy intake, energy consumption, and PAL were 3,407 kcal/day, 3,089 kcal/day and 1.75, respectively. His average PFC (Protein, Fat, Carbohydrate) ratio was 13: 24: 63. During four days of hard training, the average of his energy intake, energy consumption and PAL were 5,023 kcal/day, 5,181 kcal/day and 3.39, respectively. The average PFC ratio was 11: 18: 71. Our modified carbohydrate loading did not give him an opportunity to win a road race but, it brought very valuable results within his body such as a correction of energy balance. These improvements enabled him to increase his number of sprints during a race. Even though this study focused on only one individual cyclist, we believe that it will contribute to other Japanese amateur road racing cyclists who also need their own effective carbohydrate loading

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