Evidence map›Paper›PMID 34374968›Full record

SynthesisSports medicine (Auckland, N.Z.)2021

Ghrelin Response to Acute and Chronic Exercise: Insights and Implications from a Systematic Review of the Literature.

Nejmeddine Ouerghi, Moncef Feki, Nicola Luigi Bragazzi, Beat Knechtle, Lee Hill, Pantelis T Nikolaidis, Anissa Bouassida

Open access · hybridAbstract readSystematic Review
In one paragraph

Synthesis in Sports medicine (Auckland, N.Z.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
3.0field-weighted citation impact, top 8% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 46 citations in OpenAlex.

  1. Systematic Review: Does Exercise Training Influence Ghrelin Levels?International journal of molecular sciences · 2025
    Pooled it
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  10. Role of Peptides in Skeletal Muscle Wasting: A Scoping Review.Journal of cachexia, sarcopenia and muscle · 2025
    Article
  11. Article
  12. Physical Activity, Exerkines, and Their Role in Cancer Cachexia.International journal of molecular sciences · 2025
    Review
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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

7 authors at 6 institutions in 5 countries.

Nejmeddine OuerghiHigh Institute of Sport and Physical Education of Kef, UR13JS01, University of Jendouba, 7100, Kef, Tunisia.ORCID http://orcid.org/0000-0002-8840-1735
Moncef FekiFaculty of Medicine of Tunis, Rabta Hospital, LR99ES11, University of Tunis El Manar, 1007, Tunis, Tunisia.ORCID http://orcid.org/0000-0003-1585-4052
Nicola Luigi BragazziPostgraduate School of Public Health, Department of Health Sciences (DISSAL), University of Genoa, 16132, Genoa, Italy.
Beat KnechtleMedbase St. Gallen Am Vadianplatz, Vadianstrasse 26, 9001, St. Gallen, Switzerland. beat.knechtle@hispeed.ch.ORCID http://orcid.org/0000-0002-2412-9103
Lee HillDivision of Gastroenterology and Nutrition, Department of Pediatrics, McMaster University, Hamilton, L8S 4L8, Canada.
Pantelis T NikolaidisSchool of Health and Caring Sciences, University of West Attica, Athens, Greece.
Anissa BouassidaHigh Institute of Sport and Physical Education of Kef, UR13JS01, University of Jendouba, 7100, Kef, Tunisia.
Faculté de médecine de TunisMcMaster University · CAUniversity of Genoa · ITUniversity of Jendouba · TNUniversity of West Attica · GRUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGhrelin is a peptide hormone predominantly produced by the stomach. It exerts a wide range of functions including stimulating growth hormone release and regulating appetite, food intake, and glucose and lipid metabolism. Since physical exercise affects all these aspects, a particular interest is accorded to the relationship between ghrelin and exercise. This systematic review aimed to summarize the current available data on the topic for a better understanding of the relationship.

methodsAn extensive computerized search was performed in the PubMed and SPORTDiscus databases for retrieving relevant articles. The search contained the following keywords: ghrelin, appetite-related peptides, gastrointestinal peptides, gastrointestinal hormones, exercise, acute exercise, chronic exercise, training, and physical activity. Studies investigating the effects of acute/chronic exercise on circulating forms of ghrelin were included.

resultsThe initial search identified 840 articles. After screening, 80 articles were included. Despite a heterogeneity of studies and a variability of the findings, the review suggests that acute exercise suppresses acyl ghrelin production regardless of the participants and the exercise characteristics. Long- and very long-term exercise training programs mostly resulted in increased total and des-acyl ghrelin production. The increase is more noticeable in overweight/obese individuals, and is most likely due to weight loss resulting from the training program.

conclusionThe review suggests that exercise may impact ghrelin production. While the precise mechanisms are unclear, the effects are likely due to blood flow redistribution and weight loss for acute and chronic exercise, respectively. These changes are expected to be metabolically beneficial. Further research is needed for a better understanding of the relationship between ghrelin and exercise.

Indexed as

ExerciseGhrelinAppetiteHumansObesityWeight LossGhrelin

Identifiers

PMID34374968
PMCPMC8514378
OpenAlexW3190033843

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.