Evidence map›Paper›PMID 34530857›Full record

Trial reportJournal of the International Society of Sports Nutrition2021

Effects of 30 days of ketogenic diet on body composition, muscle strength, muscle area, metabolism, and performance in semi-professional soccer players.

A Antonio Paoli, Laura Mancin, Massimiliano Caprio, Elena Monti, Marco V Narici, Lorenzo Cenci, Fabio Piccini, Matteo Pincella, Davide Grigoletto, Giuseppe Marcolin

Registry-linked trialOpen access · goldAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Journal of the International Society of Sports Nutrition, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04078971 (Effects of a Very Low Carbohydrate Ketogenic Diet on Body Composition, Muscle Strength, Muscle Area, Metabolism and Performance in Semi-professional Soccer Players), which is not on this map. Cited by 34 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 7 pooled it
4.8field-weighted citation impact, top 4% of its field
1 · What the graph read from 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.

2 · The registry

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.

NCT04078971 nacompletednot on this map

Effects of a Very Low Carbohydrate Ketogenic Diet on Body Composition, Muscle Strength, Muscle Area, Metabolism and Performance in Semi-professional Soccer Players

TypeinterventionalSponsorAntonio PaoliRan2018 to 2018Enrolled16ConditionsAthletic PerformanceArmsWestern diet, ketogenic diet
3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 7 syntheses or guidelines pooled it, 59 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 2 countries.

A Antonio PaoliDepartment of Biomedical Sciences, University of Padua, Via Marzolo, 3, 35131, Padua, Italy. antonio.paoli@unipd.it.
Laura MancinDepartment of Biomedical Sciences, University of Padua, Via Marzolo, 3, 35131, Padua, Italy.
Massimiliano CaprioDepartment of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Rome, Italy.
Elena MontiDepartment of Biomedical Sciences, University of Padua, Via Marzolo, 3, 35131, Padua, Italy.
Marco V NariciDepartment of Biomedical Sciences, University of Padua, Via Marzolo, 3, 35131, Padua, Italy.
Lorenzo CenciHuman Inspired Technology Research Center, University of Padua, Padua, Italy.
Fabio PicciniItalian Microbiome Project, Milan, Italy.
Matteo PincellaInter FC., Milan, Italy.
Davide GrigolettoDepartment of Biomedical Sciences, University of Padua, Via Marzolo, 3, 35131, Padua, Italy.
Giuseppe MarcolinDepartment of Biomedical Sciences, University of Padua, Via Marzolo, 3, 35131, Padua, Italy.
University of Padua · ITAssociazione Italiana Di Oncologia Medica · ITFederazione Nazionale Imprese Elettroniche ed Elettrotecniche · ITSan Raffaele University of Rome · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA ketogenic diet (KD) is a nutritional approach, usually adopted for weight loss, that restricts daily carbohydrates under 30 g/day. KD showed contradictory results on sport performance, whilst no data are available on team sports. We sought to investigate the influence of a KD on different parameters in semi-professional soccer players.

methodsSubjects were randomly assigned to a iso-protein (1.8 g/Kg body weight/day) ketogenic diet (KD) or western diet (WD) for 30 days. Body weight and body composition, resting energy expenditure (REE), respiratory exchange ratio (RER), cross sectional area (CSA) and isometric muscle strength of quadriceps, counter movement jump (CMJ) and yoyo intermittent recovery test time were measured.

resultsThere was a significantly higher decrease of body fat (p = 0.0359), visceral adipose tissue (VAT) (p = 0.0018), waist circumference (p = 0.0185) and extra-cellular water (p = 0.0060) in KD compared to WD group. Lean soft tissue, quadriceps muscle area, maximal strength and REE showed no changes in both groups. RER decreased significantly in KD (p = 0.0008). Yo-yo intermittent test improved significantly (p < 0.0001) in both groups without significant differences between groups. CMJ significantly improved (p = 0.0021) only in KD.

conclusionsThis is the first study investigating the effects of a KD on semi-professional soccer players. In our study KD athletes lost fat mass without any detrimental effects on strength, power and muscle mass. When the goal is a rapid weight reduction in such athletes, the use of a KD should be taken into account.

trial registrationregistered retrospectively on Clinical Trial registration number NCT04078971 .

Indexed as

Body CompositionDiet, KetogenicMuscle StrengthSports Nutritional Physiological PhenomenaAdultAthletesDiet, WesternHumansMaleMuscle, SkeletalProspective StudiesYoung AdultBody compositionKetogenic dietMetabolismMuscle cross sectional areaSoccerYo-yo intermittent test

Identifiers

PMID34530857
PMCPMC8447662
OpenAlexW3200602749

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.