The effects of carbohydrate loading on the muscle glycogen content and the bicycling performance in healthy Japanese men.
- VernacularTitle:炭水化物ローディングが健康な日本青年男子の筋グリコーゲン量および自転車エルゴメータによる持久的能力に及ぼす影響
- Author:
NOBORU HOTTA
;
TOMOKI HORITA
;
TOSHIHIRO ISHIKO
- Publication Type:Journal Article
- Keywords:
Carbohydrate loading;
Muscle glycogen;
Endurance performance
- From:Japanese Journal of Physical Fitness and Sports Medicine
1984;33(4):184-191
- CountryJapan
- Language:Japanese
-
Abstract:
This study was undertaken to examine whether carbohydrate loading gives a good effect to improve the endurance performance in Japanese subjects who had habitually eaten carbohydrate-rich diets. The glycogen content of the vastus lateralis muscle was determined in 6 healthy male subjects with the aid of the needle biopsy technique by setting different diets after glycogen store was depleted by exhaustive exercise.
Glycogen content of the vastus lateralis muscle after mix, low and high carbohydrate diets was 22.7±2.0, 11.6±1.6 and 36.6±4.5 g/wet muscle⋅kg (mean±SD), respectively, while exhaustive time was 75′39″±10′02″, 67′58″±14′11″and 92′10″±22′10″ (mean±SD), respectively. Thus, a good correlation was noted between muscle glycogen content and work time.
It was therefore concluded that the glycogen content of the working muscle was a determinant factor for the capacity to perform long-term heavy exercise and that carbohy-drate loading attained with low carbohydrate diet and exhaustive exercise followed by high carbohydrate diet had a good effect to perform heavy exercise even in Japanese who lived on carbohydrate-rich diet.
