Crisis of confidence averted: Impairment of exercise economy and performance in elite race walkers by ketogenic low carbohydrate, high fat (LCHF) diet is reproducible

Introduction We repeated our study of intensified training on a ketogenic low-carbohydrate (CHO), high-fat diet (LCHF) in world-class endurance athletes, with further investigation of a "carryover" effect on performance after restoring CHO availability in comparison to high or periodised C...

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Bibliographic Details
Published in:PloS one 2020-06, Vol.15 (6), p.e0234027-e0234027
Main Authors: Burke, Louise M., Sharma, Avish P., Heikura, Ida A., Forbes, Sara F., Holloway, Melissa, McKay, Alannah K. A., Bone, Julia L., Leckey, Jill J., Welvaert, Marijke, Ross, Megan L.
Format: Article
Language:English
Subjects:
Adaptation
Aerobic capacity
Athletes
Availability
Bibliometrics
Biology and Life Sciences
Body fat
Carbohydrates
Clinical trials
Diet
Economics
Exercise
Food and nutrition
Health aspects
High carbohydrate diet
High fat diet
Intervention
Ketogenic diet
Low carbohydrate diet
Low fat diet
Medical research
Medicine and Health Sciences
Metabolism
Nutrient deficiency
Nutrition research
Oxidation
Oxidation-reduction reactions
Oxygen
Physical Sciences
Proteins
Restoration
Social networks
Social Sciences
Tapering
Time
Track and field athletes
Training
Walking
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Summary:Introduction We repeated our study of intensified training on a ketogenic low-carbohydrate (CHO), high-fat diet (LCHF) in world-class endurance athletes, with further investigation of a "carryover" effect on performance after restoring CHO availability in comparison to high or periodised CHO diets. Methods After Baseline testing (10,000 m IAAF-sanctioned race, aerobic capacity and submaximal walking economy) elite male and female race walkers undertook 25 d supervised training and repeat testing (Adapt) on energy-matched diets: High CHO availability (8.6 gâkg.sup.-1 âd.sup.-1 CHO, 2.1 gâkg.sup.-1 âd.sup.-1 protein; 1.2 gâkg.sup.-1 âd.sup.-1 fat) including CHO before/during/after workouts (HCHO, n = 8): similar macronutrient intake periodised within/between days to manipulate low and high CHO availability at various workouts (PCHO, n = 8); and LCHF (
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0234027