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Type IIx muscle fibers are related to poor body composition, glycemic and lipidemic blood profiles in young females: the protective role of type I and IIa muscle fibers

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Abstract

Purpose

The aim of the present study was to investigate the association between muscle fiber composition, body composition, resting glycemic–lipidemic blood profiles, in apparently healthy, young, active females.

Methods

Thirty-four young healthy female volunteers were allocated into two groups, depending on their Vastus Lateralis type IIx muscle fibers percent cross-sectional area (%CSA; H: high type IIx %CSA; L: low type IIx %CSA). Body composition was determined via dual-energy X-ray absorptiometry. Venous blood samples were collected for the determination of resting serum glucose, Insulin, Apo-A1, HOMA-IR, triglycerides (TG), total cholesterol (TC), High-density lipoprotein (HDL-C), and Low-density lipoprotein (LDL-C) concentrations. Nutritional intake was also evaluated.

Results

Individuals of the H group have significantly higher body mass, body fat percentage-mass, and resting blood indices of glycemic and lipidemic profiles, compared to those of L group (p < 0.001). Increased type IIx and low type I, IIa muscle fibers %CSAs were linked with poorer body composition, glycemic and lipidemic blood profiles (r: − 0.722 to 0.740, p < 0.001). Linear regression analyses revealed that the impact of muscle fibers %CSA (B coefficients ranged between − 0.700 and 0.835) on the above parameters, was at least, of the same or even of greater magnitude as that of body composition and daily nutritional intake (B: − 0.700 to 0.666).

Conclusion

Increased type IIx and low Type I, IIa %CSAs are associated with poorer body composition and glycemic–lipidemic profiles in young healthy females. The contribution of the muscle fiber %CSA on health status seems to be comparable to that of nutrition and body composition.

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Availability of data and materials

Data available after a reasonable request from the corresponding author.

Code availability

Not applicable.

Abbreviations

%CSA:

Percentage cross-sectional area of muscle occupied by each muscle fiber type

Apo-AI:

Apolipoprotein A-I

B:

Standardized Beta coefficient of linear regression analysis

BFMI:

Body fat mass index

BMI:

Body mass index

DXA:

Dual energy X-ray absorptiometry

H group:

High type IIx %CSA

HDL-C:

High-density lipoprotein

HOMA-IR:

Homeostatic model assessment for insulin resistance

ICC:

Intraclass correlation coefficient

L group:

Low type IIx %CSA

LBM:

Lean body mass

LBMI:

Lean body mass index

LDL-C:

Low-density lipoprotein

TG:

Triglycerides

VL:

Vastus lateralis

VLDL:

Very-low-density lipoprotein

TC:

Total cholesterol

GLUT4:

Glucose transporter type 4

References

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Acknowledgements

We wish to thank the participants for their efforts and consistency throughout the study.

Funding

Part of the study was funded by the Postgraduate Programme of “Applied Nutrition and Dietetics” of Harokopio University.

Author information

Authors and Affiliations

Authors

Contributions

All authors contributed to the study conception and design. CRediT author statement: SM: Conceptualization, Visualization, Methodology, Project Administration, Validation, Writing—Original Draft, Writing—Review and Editing. TN: Conceptualization, Funding Acquisition, Resources, Writing—Review and Editing, Supervision. TM: Investigation, Data Curation, Formal Anal ysis. EK: Investigation, Data Curation, Formal Analysis. EE: Investigation, Data Curation, Formal Analysis. CP: Investigation, Methodology, Writing—Review and Editing. GP: Investigation, Methodology, Writing—Review and Editing. GT: Conceptualization, Visualization, Writing—Review and Editing, Supervision.

Corresponding author

Correspondence to Spyridon Methenitis.

Ethics declarations

Conflict of interest

The authors have no conflict of interest to declare.

Consent to participate

Ιnformed consents were obtained from each participant before the initiation of the study.

Consent for publication

Not applicable.

Ethics approval

All experimental procedures used, comply with local governmental laws for human subjects. The study approved by the School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Greece ethics committee (Ref. No. 1039/14-02-2018).

Additional information

Communicated by Massimo Pagani.

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Methenitis, S., Nomikos, T., Mpampoulis, T. et al. Type IIx muscle fibers are related to poor body composition, glycemic and lipidemic blood profiles in young females: the protective role of type I and IIa muscle fibers. Eur J Appl Physiol 124, 585–594 (2024). https://doi.org/10.1007/s00421-023-05302-4

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  • DOI: https://doi.org/10.1007/s00421-023-05302-4

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