%0 Journal Article
%T Periodization of Carbohydrate Intake: Short-Term Effect on Performance
%A Christophe Hausswirth
%A Eve Tiollier
%A Jeanick Brisswalter
%A John A. Hawley
%A Laurie-Anne Marquet
%A Louise M. Burke
%A Odeline Molle
%J Archive of "Nutrients".
%D 2016
%R 10.3390/nu8120755
%X Background: ¡°Sleep-low¡± consists of a sequential periodization of carbohydrate (CHO) availability¡ªlow 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¡ªone 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
%K carbohydrate
%K performance
%K training
%K cycling time trial
%K trained athletes
%K lipid oxidation
%K perception of effort
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5188410/