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Nutrients. 2016 Nov 25;8(12). pii: E755.

Periodization of Carbohydrate Intake: Short-Term Effect on Performance.

Author information

1
Laboratory of Sport, Expertise and Performance, French National Institute of Sport, Expertise and Performance (INSEP), 75012 Paris, France. laurie-anne.marquet@insep.fr.
2
Université Côte d'Azur, LAMHESS, 06205 Nice, France. laurie-anne.marquet@insep.fr.
3
Laboratory of Sport, Expertise and Performance, French National Institute of Sport, Expertise and Performance (INSEP), 75012 Paris, France. hausswirthc@gmail.com.
4
Laboratory of Sport, Expertise and Performance, French National Institute of Sport, Expertise and Performance (INSEP), 75012 Paris, France. odeline.molle@insep.fr.
5
Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, VIC 3065, Australia. John.Hawley@acu.edu.au.
6
Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool L3 5UA, UK. John.Hawley@acu.edu.au.
7
Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, VIC 3065, Australia. louise.burke@ausport.gov.au.
8
Sports Nutrition, Australian Institute of Sport (AIS), Belconnen, ACT 2617, Australia. louise.burke@ausport.gov.au.
9
Laboratory of Sport, Expertise and Performance, French National Institute of Sport, Expertise and Performance (INSEP), 75012 Paris, France. eve.tiollier@insep.fr.
10
Université Côte d'Azur, LAMHESS, 06205 Nice, France. brisswalter@unice.fr.

Abstract

BACKGROUND:

"Sleep-low" consists of a sequential periodization of carbohydrate (CHO) availability-low glycogen recovery after "train high" glycogen-depleting interval training, followed by an overnight-fast and light intensity training ("train low") the following day. This strategy leads to an upregulation of several exercise-responsive signaling proteins, but the chronic effect on performance has received less attention. We investigated the effects of short-term exposure to this strategy on endurance performance.

METHODS:

Following training familiarization, 11 trained cyclists were divided into two groups for a one-week intervention-one group implemented three cycles of periodized CHO intake to achieve the sleep-low strategy over six training sessions (SL, CHO intake: 6 g·kg-1·day-1), whereas the control group consumed an even distribution of CHO over the day (CON). Tests were a 2 h submaximal ride and a 20 km time trial.

RESULTS:

SL improved their performance (mean: +3.2%; p < 0.05) compared to CON. The improvement was associated with a change in pacing strategy with higher power output during the second part of the test. No change in substrate utilization was observed after the training period for either group.

CONCLUSION:

Implementing the "sleep-low" strategy for one week improved performance by the same magnitude previously seen in a three-week intervention, without any significant changes in selected markers of metabolism.

KEYWORDS:

carbohydrate; cycling time trial; lipid oxidation; perception of effort; performance; trained athletes; training

PMID:
27897989
PMCID:
PMC5188410
DOI:
10.3390/nu8120755
[Indexed for MEDLINE]
Free PMC Article

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