PMID- 38276556
OWN - NLM
STAT- MEDLINE
DCOM- 20240129
LR  - 20240204
IS  - 2072-6643 (Electronic)
IS  - 2072-6643 (Linking)
VI  - 16
IP  - 2
DP  - 2024 Jan 21
TI  - A Five-Week Periodized Carbohydrate Diet Does Not Improve Maximal Lactate 
      Steady-State Exercise Capacity and Substrate Oxidation in Well-Trained Cyclists 
      compared to a High-Carbohydrate Diet.
LID - 10.3390/nu16020318 [doi]
LID - 318
AB  - There is a growing interest in studies involving carbohydrate (CHO) manipulation 
      and subsequent adaptations to endurance training. This study aimed to analyze 
      whether a periodized carbohydrate feeding strategy based on a daily training 
      session has any advantages compared to a high-carbohydrate diet in well-trained 
      cyclists. Seventeen trained cyclists (VO(2peak) = 70.8 +/- 6.5 mL.kg(-1).min(-1)) 
      were divided into two groups, a periodized (PCHO) group and a high-carbohydrate 
      (HCHO) group. Both groups performed the same training sessions for five weeks. In 
      the PCHO group, 13 training sessions were performed with low carbohydrate 
      availability. In the HCHO group, all sessions were completed following previous 
      carbohydrate intake to ensure high pre-exercise glycogen levels. In both groups, 
      there was an increase in the maximal lactate steady state (MLSS) (PCHO: 244.1 +/- 
      29.9 W to 253.2 +/- 28.4 W; p = 0.008; HCHO: 235.8 +/- 21.4 W to 246.9 +/- 16.7 W; p = 
      0.012) but not in the time to exhaustion at MLSS intensity. Both groups increased 
      the percentage of muscle mass (PCHO: p = 0.021; HCHO: p = 0.042) and decreased 
      the percent body fat (PCHO: p = 0.021; HCHO: p = 0.012). We found no differences 
      in carbohydrate or lipid oxidation, heart rate, and post-exercise lactate 
      concentration. Periodizing the CHO intake in well-trained cyclists during a 
      5-week intervention did not elicit superior results to an energy intake-matched 
      high-carbohydrate diet in any of the measured outcomes.
FAU - Prieto-Bellver, Gorka
AU  - Prieto-Bellver G
AUID- ORCID: 0000-0003-0166-0695
AD  - Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, 
      University of Castilla-La Mancha, 45071 Toledo, Spain.
FAU - Diaz-Lara, Javier
AU  - Diaz-Lara J
AUID- ORCID: 0000-0003-1970-6313
AD  - Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, 
      University of Castilla-La Mancha, 45071 Toledo, Spain.
FAU - Bishop, David J
AU  - Bishop DJ
AUID- ORCID: 0000-0002-6956-9188
AD  - Institute for Health and Sport (IHeS), Victoria University, Footscray VIC 3011, 
      Australia.
FAU - Fernandez-Saez, Jose
AU  - Fernandez-Saez J
AD  - Unitat de Suport a la Recerca Terres de l'Ebre, Fundacio Institut Universitari 
      per a la Recerca a l'Atencio Primaria de Salut Jordi Gol i Gurina (IDIAPJGol), 
      43500 Tortosa, Spain.
FAU - Abian-Vicen, Javier
AU  - Abian-Vicen J
AUID- ORCID: 0000-0001-9635-3289
AD  - Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, 
      University of Castilla-La Mancha, 45071 Toledo, Spain.
FAU - San-Millan, Inigo
AU  - San-Millan I
AD  - Department of Human Physiology and Nutrition, University of Colorado, Colorado 
      Springs, CO 80918, USA.
FAU - Santos-Concejero, Jordan
AU  - Santos-Concejero J
AUID- ORCID: 0000-0001-9467-525X
AD  - Department of Physical Education and Sport, University of the Basque Country 
      UPV/EHU, 48940 Leioa, Spain.
LA  - eng
PT  - Journal Article
DEP - 20240121
PL  - Switzerland
TA  - Nutrients
JT  - Nutrients
JID - 101521595
RN  - 33X04XA5AT (Lactic Acid)
RN  - 93672-46-9 (1,3,4,5,6-pentachlorocyclohexene-1-oxide)
RN  - 9005-79-2 (Glycogen)
RN  - 0 (Dietary Carbohydrates)
RN  - 59NEE7PCAB (Hexachlorocyclohexane)
SB  - IM
MH  - Humans
MH  - *Lactic Acid
MH  - *Physical Endurance/physiology
MH  - Exercise Tolerance
MH  - Glycogen/metabolism
MH  - Diet
MH  - Dietary Carbohydrates
MH  - Oxygen Consumption
MH  - Hexachlorocyclohexane/*analogs & derivatives
PMC - PMC10820927
OTO - NOTNLM
OT  - body composition
OT  - carbohydrates
OT  - cycling
OT  - fat oxidation
OT  - performance
OT  - train low
COIS- The authors declare no conflicts of interest.
EDAT- 2024/01/26 12:44
MHDA- 2024/01/29 06:44
PMCR- 2024/01/21
CRDT- 2024/01/26 09:28
PHST- 2023/12/30 00:00 [received]
PHST- 2024/01/15 00:00 [revised]
PHST- 2024/01/19 00:00 [accepted]
PHST- 2024/01/29 06:44 [medline]
PHST- 2024/01/26 12:44 [pubmed]
PHST- 2024/01/26 09:28 [entrez]
PHST- 2024/01/21 00:00 [pmc-release]
AID - nu16020318 [pii]
AID - nutrients-16-00318 [pii]
AID - 10.3390/nu16020318 [doi]
PST - epublish
SO  - Nutrients. 2024 Jan 21;16(2):318. doi: 10.3390/nu16020318.