Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
권호 표지

Effects of Dietary Fatty Acid Composition on Pro- and Macro-Glycogen Utilization and Resynthesis in Rat Skeletal Muscle

식이 지방산 종류가 운동 시 조직 내 Pro-및 Macro-Glycogen의 동원 및 재합성에 미치는 영향

  • Lee, Jong-Sam (Department of Physical Education, Daegu University) ;
  • Kim, Jae-Chul (Department of Sport Science, College of Natural Science, Chonbuk National University) ;
  • Kwon, Young-Woo (Division of Physical Education, Yeungnam University) ;
  • Lee, Jang-Kyu (Division of Lifetime Sports and Leisure, Sangmyung University) ;
  • Lee, Jeong-Pil (Sport Medicine Laboratory, Korea National Sport University) ;
  • Yoon, Chung-Soo (Department of Physical Education, College of Education, Jeonbuk National University)
  • 이종삼 (대구대학교 체육학과) ;
  • 김재철 (전북대학교 스포츠과학과) ;
  • 권영우 (영남대학교 체육학부) ;
  • 이장규 (상명대학교 사회체육학부) ;
  • 이정필 (한국체육대학교 스포츠의학실) ;
  • 윤정수 (전북대학교 체육교육학과)
  • Published : 2007.04.30
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Abstract

The purpose of this study was to investigate that the effect of dietary fatty acid composition on pro- and macro-glycogen utilization and resynthesis. The analyses were further extended for different muscle fibers (type I, type II, & type IIb) as well as tissues (i.e., liver & heart). Total one hundred sixty Sprague-Dawley rats were used, and rats were randomly allocated into four experimental groups: animals fed standard chow diet (n=40), animals fed saturated fatty acid diet (n=40), animals fed monounsaturated fatty acid (n=40), and animals fed polyunsaturated fatty acid (n=40). Animals in each groups were further divided into five subgroups: sacrificed at REST (n=8), sacrificed at immediately after 3 hr swim exercise (P-0HR, n=8), sacrificed at one hour after 3 hr swim exercise (P-1HR, n=8), sacrificed at four hour after 3 hr swim exercise (P-4HR, n=8), and sacrificed at twenty-four hour after 3 hr swim exercise (P-24HR, n=8). Soleus (type I), red gastrocnemius (type IIa), white gastrocnemius (type IIb), liver, and heart were dissected out at appropriated time point from all animals, and were used for analyses of pro- & macro-glycogen concentrations. After 8 weeks of dietary interventions, there was no significant difference in body mass in any of dietary conditions (p>.05). After 3 hr swim exercise, blood lactate level was higher compared to resting conditions in all groups, but it was returned to resting value after 1 hr rest (p<.05). Free fatty acid concentration was higher in all high fat fed groups(regardless of fatty acid composition) than CHOW consumed group. At rest, pro- & macro-glycogen concentration was not different from any of experimental groups (p>.05). Regardless of forms of glycogen, the highest level was observed in liver (p<.01), and most cases of supercompensation after 3hr exercise observed in this study were occurred in CHOW fed tissues. Except heart muscle, all tissues used in this study showed that pro- and macro-glycogen concentration was significantly decreased after 3 hr exercise. Based on these results, two conclusions were made: first, there is no different level of glycogen content in various tissues regardless of types of fatty acids consumed and second, the highest mobilization rate would be demonstrated from CHOW fed animals compare to animals that consumed any kinds of fatty acid diet if prolonged exercise is applied.

Keywords

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