There is no difference between two and five minutes of static stretching training and detraining on gastrocnemius medialis muscle thickness, pennation angle and fascicle length

William Friderichs; Franceca C. Sonda; Anelize Cini; Gabriela Fraporti; Marco A. Vaz; Claudia S. Lima

doi:10.20338/bjmb.v18i1.427

There is no difference between two and five minutes of static stretching training and detraining on gastrocnemius medialis muscle thickness, pennation angle and fascicle length

Authors

William Friderichs Biomechanics and Kinesiology Research Group, Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Universidade do Vale do Rio dos Sinos, São Leopoldo, RS, Brazil https://orcid.org/0000-0002-5979-746X
Franceca C. Sonda Biomechanics and Kinesiology Research Group, Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil https://orcid.org/0000-0002-5762-7918
Anelize Cini Kinesiology and Kinesiotherapy Research Group, Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil - anelizecini@yahoo.com.br https://orcid.org/0000-0003-0830-2321
Gabriela Fraporti Kinesiology and Kinesiotherapy Research Group, Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil https://orcid.org/0009-0005-0667-0173
Marco A. Vaz Biomechanics and Kinesiology Research Group, Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil https://orcid.org/0000-0001-6741-3502
Claudia S. Lima Kinesiology and Kinesiotherapy Research Group, Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil https://orcid.org/0000-0002-6305-743X

DOI:

https://doi.org/10.20338/bjmb.v18i1.427

Keywords:

Ultrasound, Fascicle length, Pennation angle, Muscle thickness, Muscle stretching, Exercises

Abstract

BACKGROUND: Skeletal muscle’s architecture can undergo temporary or permanent adaptations when subjected to chronic passive loading, such as during passive static stretching (PSS).

AIM: We evaluated the effects of a 6-week PSS program, with two and five minutes of duration, on the architecture of the Gastrocnemius Medialis (GM) muscle. In addition, we determined the inter-analyzer reliability of the GM’s muscle architecture images analysis process.

METHOD: 30 healthy adults participated in this study. Participants were divided into three groups: Control Group (CG), 2-minutes of PSS (G2) and 5-minutes of PSS (G5). Plantar flexors’ PSS was applied three times a week for 6 weeks. Participants were assessed before intervention, after intervention, and two weeks post detraining. GM’s muscle thickness (MT), pennation angle (PA) and fascicle length (FL) were measured with an ultrasound system by an experienced evaluator. All images were analyzed by two independent analyzers, using the Image-J software.

RESULTS: No significant effects were identified (p>0.05) of the PSS program on muscle architecture parameters. No architectural changes were observed following the detraining period. GM’s MT results presented excellent reliability, while good reliability was found for the FL measures. For PA, good reliability was only observed for the post-intervention moment. On the pre-intervention and follow-up moments, the intraclass correlation coefficients values were moderate.

CONCLUSION: A 6-week PSS program did not generate adaptations on GM’s muscle architecture parameters in healthy subjects, independent of the stretching duration. Muscle architecture parameters are reliable when analyzed by different analyzers following clinical interventions.

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Published

2024-07-21

How to Cite

Friderichs, W., Sonda, F. C., Cini, A., Fraporti, G., Vaz, M. A., & Lima, C. S. (2024). There is no difference between two and five minutes of static stretching training and detraining on gastrocnemius medialis muscle thickness, pennation angle and fascicle length. Brazilian Journal of Motor Behavior, 18(1). https://doi.org/10.20338/bjmb.v18i1.427

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Issue

Vol. 18 No. 1 (2024)

Section

Research Articles

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