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Erschienen in: European Journal of Applied Physiology 9/2018

07.07.2018 | Original Article

Influence of full range of motion vs. equalized partial range of motion training on muscle architecture and mechanical properties

verfasst von: Maria João Valamatos, Francisco Tavares, Rute M. Santos, António P. Veloso, Pedro Mil-Homens

Erschienen in: European Journal of Applied Physiology | Ausgabe 9/2018

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Abstract

Purpose

The purpose of this study was to determine the effect of a 15-week partial range of motion (ROM) resistance training program on the vastus lateralis (VL) architecture and mechanical properties, when the time under tension (TUT) was equalized.

Methods

Nineteen untrained male subjects were randomly assigned to a control (Control; n = 8) or training (TG; n = 11) group. In the TG, the dominant and nondominant legs were randomly selected to be trained with a full ROM (FULL) or a partial ROM (PART) in an isokinetic dynamometer. Training volume was equalized based on the TUT by manipulating sets and repetitions. The VL muscle architecture was assessed by B-mode ultrasonography at rest and during maximal isometric knee extension contractions (MVCs) at ten knee angles. The VL fascicle force and specific tension were calculated from the MVCs with superimposed stimuli, accounting for the moment arm length, muscle architecture, and antagonist coactivation.

Results

The FULL training induced changes in fascicle length (FL) (4.9 ± 2.0%, P < 0.001) and specific tension (25.8 ± 18.7%, P < 0.001). There was a moderate effect of PART training on the physiological cross-sectional area (PCSA) (7.8 ± 4.0%, P < 0.001, dav = 0.6) and torque–angle adaptations (average increase 17.7 ± 3.9%, P < 0.05).

Conclusions

These results provide evidence that crucial architectural and mechanical muscle adaptations are dependent on the ROM used in strength training. It seems that muscle FL and specific tension can be increased by pure concentric training if greater ROM is used. Conversely, restricting the ROM to shorter muscle lengths promotes a greater PCSA and angle-specific strength adaptations.
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Metadaten
Titel
Influence of full range of motion vs. equalized partial range of motion training on muscle architecture and mechanical properties
verfasst von
Maria João Valamatos
Francisco Tavares
Rute M. Santos
António P. Veloso
Pedro Mil-Homens
Publikationsdatum
07.07.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Applied Physiology / Ausgabe 9/2018
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-018-3932-x

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