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 language | English |
|---|---|
| Pages (from-to) | 354-359 |
| Number of pages | 6 |
| Journal | Journal of Nutritional Science and Vitaminology |
| Volume | 58 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2012 |
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Keywords
- Exercise
- High fat
- Lipolysis
- Training
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Nutrition and Dietetics
Cite this
Impact of intensive high-fat ingestion in the early stage of recovery from exercise training on substrate metabolism during exercise in humans. / Ichinose, Takashi; Arai, Natsuko; Nagasaka, Tomoaki; Asano, Masaya; Hashimoto, Kenji.
In: Journal of Nutritional Science and Vitaminology, Vol. 58, No. 5, 2012, p. 354-359.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Impact of intensive high-fat ingestion in the early stage of recovery from exercise training on substrate metabolism during exercise in humans
AU - Ichinose, Takashi
AU - Arai, Natsuko
AU - Nagasaka, Tomoaki
AU - Asano, Masaya
AU - Hashimoto, Kenji
PY - 2012
Y1 - 2012
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.
KW - Exercise
KW - High fat
KW - Lipolysis
KW - Training
UR - http://www.scopus.com/inward/record.url?scp=84872722205&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84872722205&partnerID=8YFLogxK
U2 - 10.3177/jnsv.58.354
DO - 10.3177/jnsv.58.354
M3 - Article
C2 - 23327971
AN - SCOPUS:84872722205
VL - 58
SP - 354
EP - 359
JO - Journal of Nutritional Science and Vitaminology
JF - Journal of Nutritional Science and Vitaminology
SN - 0301-4800
IS - 5
ER -