Effects of Carnitine Coingested Caffeine on Carnitine Metabolism and Endurance Capacity in Athletes

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The purpose of this study was to examine whether caffeine (CAF), carnitine (CAR), or CAP +CAR mixture administration affects exercise endurance time via carnitine metabolism. Water (CON), CAF, CAR, or CAF+CAR mixture was administered to five male rugby athletes participating in this study by a randomized double-blind fashion who were made to ride a cycle ergometer for exercise. The CAF effect on exercise endurance time was small, but the CAR trial significantly increased the exercise endurance time compared with CON trial; a further CAP+CAR mixture trial had greater effects on the exercise endurance time than those of a CON, CAF, or CAR trial. A CAR or CAF+CAR mixed trial increased uri-nary nonesterified carnitine (NEC) and total carnitine (TCAR), but no changes were ob-served in acid-soluble acylcarnitine (ASAC) and acid-insoluble acylcarnitine (AIAC) excre-tion. A CAR or CAF+CAR mixed trial resulted in higher levels of plasma NEC, ASAC, and TCAR fractions than the CON and CAF trials did on exhaustion time. Total cholesterol, triglyceride, and free fatty acid in blood were significantly increased at exhaustion time, but they were not affected in the CAF or the CAR trial. These results suggest that carnitine in-gestion could promote fat oxidation, resulting in higher endurance performance in athletes, and especially these ergogenic effects of carnitine coingested with caffeine may be greater than those of carnitine alone.

収録刊行物

  • Journal of nutritional science and vitaminology

    Journal of nutritional science and vitaminology 47(6), 378-384, 2001-12-01

    一般財団法人 学会誌刊行センター

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各種コード

  • NII論文ID(NAID)
    10013010395
  • NII書誌ID(NCID)
    AA00703822
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    03014800
  • NDL 記事登録ID
    6063359
  • NDL 雑誌分類
    ZR2(科学技術--生物学--生化学)
  • NDL 請求記号
    Z53-B484
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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