Impact of intensive high-fat ingestion in the early stage of recovery from exercise training on substrate metabolism during exercise in humans

Takashi Ichinose, Natsuko Arai, Tomoaki Nagasaka, Masaya Asano, Kenji Hashimoto

    Research output: Contribution to journalArticle

    Abstract

    Not only increasing body carbohydrate (CHO) stores before exercise but also suppressing CHO oxidation during exercise is important for improving endurance performance. We tested the hypothesis that intensive high-fat ingestion in the early stage of recovery from exercise training (ET) for 2 d would suppress CHO oxidation during exercise by increasing whole body lipolysis and/or fat oxidation. In a randomized crossover design, on days 1 and 2, six male subjects performed cycle ET at 50% peak oxygen consumption (VO2 peak) for 60-90 min, and consumed a control diet (CON: 1,224 kcal, 55% carbohydrate, 30% fat) or the same diet supplemented with high fat (HF: 1,974 kcal, 34% carbohydrate, 56% fat) 1 h after ET, with the diet other than post-ET similar in both trials. On day 3, subjects performed cycle exercise at 65% VO2 peak until exhaustion. Exercise time to exhaustion was longer in the HF trial than in the CON trial (CON: 48.9±6.7 vs. HF: 55.8±7.7 min, p<0.05). In the HF trial, total fat oxidation until exhaustion was higher, accompanied by higher post-exercise plasma glycerol concentration, than in the CON trial (CON: 213±54 vs. HF: 286±63 kcal, p<0.05), whereas total carbohydrate oxidation until exhaustion was not different between trials. These results suggest that intensive high-fat ingestion in the early stage of recovery from ET for a few days until the day before exercise was an effective means of eliciting a CHO-sparing effect during exercise by enhancing fat metabolism.

    Original languageEnglish
    Pages (from-to)354-359
    Number of pages6
    JournalJournal of Nutritional Science and Vitaminology
    Volume58
    Issue number5
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Eating
    Fats
    Exercise
    Carbohydrates
    Diet
    Lipolysis
    Oxygen Consumption
    Glycerol
    Cross-Over Studies

    Keywords

    • Exercise
    • High fat
    • Lipolysis
    • Training

    ASJC Scopus subject areas

    • Medicine (miscellaneous)
    • Nutrition and Dietetics

    Cite this

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    abstract = "Not only increasing body carbohydrate (CHO) stores before exercise but also suppressing CHO oxidation during exercise is important for improving endurance performance. We tested the hypothesis that intensive high-fat ingestion in the early stage of recovery from exercise training (ET) for 2 d would suppress CHO oxidation during exercise by increasing whole body lipolysis and/or fat oxidation. In a randomized crossover design, on days 1 and 2, six male subjects performed cycle ET at 50{\%} peak oxygen consumption (VO2 peak) for 60-90 min, and consumed a control diet (CON: 1,224 kcal, 55{\%} carbohydrate, 30{\%} fat) or the same diet supplemented with high fat (HF: 1,974 kcal, 34{\%} carbohydrate, 56{\%} fat) 1 h after ET, with the diet other than post-ET similar in both trials. On day 3, subjects performed cycle exercise at 65{\%} VO2 peak until exhaustion. Exercise time to exhaustion was longer in the HF trial than in the CON trial (CON: 48.9±6.7 vs. HF: 55.8±7.7 min, p<0.05). In the HF trial, total fat oxidation until exhaustion was higher, accompanied by higher post-exercise plasma glycerol concentration, than in the CON trial (CON: 213±54 vs. HF: 286±63 kcal, p<0.05), whereas total carbohydrate oxidation until exhaustion was not different between trials. These results suggest that intensive high-fat ingestion in the early stage of recovery from ET for a few days until the day before exercise was an effective means of eliciting a CHO-sparing effect during exercise by enhancing fat metabolism.",
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    AU - Ichinose, Takashi

    AU - Arai, Natsuko

    AU - Nagasaka, Tomoaki

    AU - Asano, Masaya

    AU - Hashimoto, Kenji

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    N2 - Not only increasing body carbohydrate (CHO) stores before exercise but also suppressing CHO oxidation during exercise is important for improving endurance performance. We tested the hypothesis that intensive high-fat ingestion in the early stage of recovery from exercise training (ET) for 2 d would suppress CHO oxidation during exercise by increasing whole body lipolysis and/or fat oxidation. In a randomized crossover design, on days 1 and 2, six male subjects performed cycle ET at 50% peak oxygen consumption (VO2 peak) for 60-90 min, and consumed a control diet (CON: 1,224 kcal, 55% carbohydrate, 30% fat) or the same diet supplemented with high fat (HF: 1,974 kcal, 34% carbohydrate, 56% fat) 1 h after ET, with the diet other than post-ET similar in both trials. On day 3, subjects performed cycle exercise at 65% VO2 peak until exhaustion. Exercise time to exhaustion was longer in the HF trial than in the CON trial (CON: 48.9±6.7 vs. HF: 55.8±7.7 min, p<0.05). In the HF trial, total fat oxidation until exhaustion was higher, accompanied by higher post-exercise plasma glycerol concentration, than in the CON trial (CON: 213±54 vs. HF: 286±63 kcal, p<0.05), whereas total carbohydrate oxidation until exhaustion was not different between trials. These results suggest that intensive high-fat ingestion in the early stage of recovery from ET for a few days until the day before exercise was an effective means of eliciting a CHO-sparing effect during exercise by enhancing fat metabolism.

    AB - Not only increasing body carbohydrate (CHO) stores before exercise but also suppressing CHO oxidation during exercise is important for improving endurance performance. We tested the hypothesis that intensive high-fat ingestion in the early stage of recovery from exercise training (ET) for 2 d would suppress CHO oxidation during exercise by increasing whole body lipolysis and/or fat oxidation. In a randomized crossover design, on days 1 and 2, six male subjects performed cycle ET at 50% peak oxygen consumption (VO2 peak) for 60-90 min, and consumed a control diet (CON: 1,224 kcal, 55% carbohydrate, 30% fat) or the same diet supplemented with high fat (HF: 1,974 kcal, 34% carbohydrate, 56% fat) 1 h after ET, with the diet other than post-ET similar in both trials. On day 3, subjects performed cycle exercise at 65% VO2 peak until exhaustion. Exercise time to exhaustion was longer in the HF trial than in the CON trial (CON: 48.9±6.7 vs. HF: 55.8±7.7 min, p<0.05). In the HF trial, total fat oxidation until exhaustion was higher, accompanied by higher post-exercise plasma glycerol concentration, than in the CON trial (CON: 213±54 vs. HF: 286±63 kcal, p<0.05), whereas total carbohydrate oxidation until exhaustion was not different between trials. These results suggest that intensive high-fat ingestion in the early stage of recovery from ET for a few days until the day before exercise was an effective means of eliciting a CHO-sparing effect during exercise by enhancing fat metabolism.

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