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Biological Variables Associated With the Response to Intensive Training in Athletes

NCT05279196 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 40

Last updated 2024-09-19

No results posted yet for this study

Summary

There is in humans, at the muscular level, a great interindividual variability in response to the same mechanical stress. This phenotypic variability is multifactorial, influenced by environmental factors as well as multiple genetic variants. Thus, for the same level of muscle damage, two subjects with the same anthropometric characteristic, the same age, with the same medical history and the same level of physical activity, will present a variable level of muscle regeneration underpinned by the biological function of muscular stem cells and their microenvironment. Thus, faced with the same training, some athletes will develop iterative muscular lesions and more disabling repair deficits than others without knowing the reason of this greater susceptibility.

Indeed, the links between the genotype of the skeletal muscle fiber and its response to exercise, as well as the regulation of muscle mass are poorly understood. Yet, in young adults, up to 70% of the observed variability in muscle strength and size is hereditary. This heritability of muscle size and strength seems to be lower in older people, probably related to increased comorbidity. Numerous experiments with athletes subjected to the same resistance exercise training have identified good and bad hypertrophic skeletal muscle responders. However, genetic variants that contribute to skeletal muscle strength and mass are largely understudied while a growing body of evidence indicates that epigenetic effectors, which modulate gene expression, may contribute to human muscle response heterogeneity to the same mechanical stress. Thus, to date, no analysis of the role of the interaction between genetic and epigenetic factors involved in the muscle functional response to exercise exists. The main hypothesis is that the epigenetic status of muscle stem cells (satellite cells) is an important contributor in muscle mass response to exercise by modulating chromatin architecture.

Thus this study will identify the epigenetic modifications induced by training and their interaction with the genetic factors involved in the response of the biological function of the satellite cells to this training and on the other hand, to be able to link it to a blood signature.

Conditions

  • Muscle Injury

Interventions

OTHER

Quadriceps microbiopsy and blood collection

Microbiopsy of the quadriceps muscle using a needle, "Tru-cut" biopsy, associated with a blood sampling at the start and after 6 months of a muscle strengthening training program

Sponsors & Collaborators

  • University Hospital, Montpellier

    lead OTHER

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
40 Years
Max Age
60 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-09-30
Primary Completion
2029-03-31
Completion
2029-03-31

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05279196 on ClinicalTrials.gov