Trial reportJournal of the International Society of Sports Nutrition2019
Effect of a four-week ketogenic diet on exercise metabolism in CrossFit-trained athletes.
Trial report in Journal of the International Society of Sports Nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03665948 (The Effect of Ketogenic and Carbohydrate, Low-Glycemic Index Diet on Physical and Specific Performance Capacity, and Exercise Metabolism in Crossfit- Trained Athletes), which is not on this map. Cited by 42 papers, 6 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
The Effect of Ketogenic and Carbohydrate, Low-Glycemic Index Diet on Physical and Specific Performance Capacity, and Exercise Metabolism in Crossfit- Trained Athletes
Who cites it
42 citing papers in PubMed, 6 syntheses or guidelines pooled it, 72 citations in OpenAlex.
- Effects of Low-Carbohydrate and Ketogenic Diets on Anaerobic Performance in Competitive Athletes: A Systematic Review and Meta-Analysis.Nutrients · 2026Pooled it
- Pooled it
- Efficacy of Nutritional Strategies on the Improvement of the Performance and Health of the Athlete: A Systematic Review.International journal of environmental research and public health · 2022Pooled it
- Pooled it
- Influences of Ketogenic Diet on Body Fat Percentage, Respiratory Exchange Rate, and Total Cholesterol in Athletes: A Systematic Review and Meta-Analysis.International journal of environmental research and public health · 2021Pooled it
- CrossFit® Training Strategies from the Perspective of Concurrent Training: A Systematic Review.Journal of sports science & medicine · 2020Pooled it
- Twelve-Week Colostrum Bovinum Supplementation Supports Aerobic Capacity but has No Effect on Body Composition in Endurance-Trained Males: A Randomized Placebo-Controlled Crossover Study.European journal of sport science · 2025Trial
- DoesNutrients · 2024Trial
- Effects of a Ketogenic Diet on Body Composition in Healthy, Young, Normal-Weight Women: A Randomized Controlled Feeding Trial.Nutrients · 2024Trial
- The effect of 12-week high-doseFrontiers in immunology · 2024Trial
- Trial
- Effect of a Four-Week Vegan Diet on Performance, Training Efficiency and Blood Biochemical Indices in CrossFit-Trained Participants.Nutrients · 2022Trial
- Effects of a low-carbohydrate ketogenic diet on health parameters in resistance-trained women.European journal of applied physiology · 2021Trial
- The effect of multi-ingredient intra- versus extra-cellular buffering supplementation combined with branched-chain amino acids and creatine on exercise-induced ammonia blood concentration and aerobic capacity in taekwondo athletes.Journal of the International Society of Sports Nutrition · 2021Trial
- Is a Four-Week Ketogenic Diet an Effective Nutritional Strategy in CrossFit-Trained Female and Male Athletes?Nutrients · 2021Trial
- Soft Tissue Mobilization and Stretching for Shoulder in CrossFitters: A Randomized Pilot Study.International journal of environmental research and public health · 2021Trial
- Effects of a ketogenic diet on body composition and strength in trained women.Journal of the International Society of Sports Nutrition · 2020Trial
- Effects of the Paleo diet on resting metabolic rate in handball players.Scientific reports · 2026Article
- Article
- From Performance to Health: A Global Scientometric Analysis of the Evolution of CrossFit Research.Sports (Basel, Switzerland) · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
backgroundThe ketogenic diet is becoming a popular nutritional model among athletes. However, the relationship between its use and metabolism during exercise seems to have not been fully investigated.
methodsThe aim of the study was to assess the effects of a four-week ketogenic diet (KD) on fat and carbohydrate (CHO) utilization during an incremental cycling test (ICT) in CrossFit-trained female (n = 11) and male (n = 11) athletes. During the ICT (while consuming the customary diet and after the KD), oxygen uptake and carbon dioxide exhalation were registered, and CHO and fat utilization as well as energy expenditure were calculated.
resultsIn males, the KD led to an increase in fat utilization (g·min
conclusionsMale CrossFit-trained athletes seem to be more prone to shifts in macronutrient utilization (in favor of fat utilization) during submaximal intensity exercise under a ketogenic diet than are female athletes.
trial registrationClinical Trials Gov, NCT03665948 . Registered 11 September 2018 (retrospectively registered).
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.