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Related Experiment Video

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Resting-State Connectivity and Neuroimaging of Prefrontal Cortex Activity During a Block-Design Yoga Asana Practice Using fNIRS
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Scapular Muscle Activity During Static Yoga Postures.

Jaclyn N Chopp-Hurley, Courtney Prophet, Brynn Thistle

    The Journal of Orthopaedic and Sports Physical Therapy
    |April 7, 2018
    PubMed
    Summary

    Certain yoga poses significantly activate scapular stabilizer muscles, offering potential benefits for shoulder rehabilitation. This study measured muscle activity during various isometric yoga postures.

    Keywords:
    complementary therapieselectromyographyphysical therapy exercisesrehabilitationupper extremity

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    Area of Science:

    • Sports Medicine
    • Kinesiology
    • Rehabilitation Science

    Background:

    • Yoga's popularity is increasing, yet its effects on shoulder muscles are not well understood.
    • Scapular stabilizer muscles are crucial for shoulder health and rehabilitation.
    • The utility of yoga postures for activating these muscles requires investigation.

    Purpose of the Study:

    • To quantify the muscle activity of scapular stabilizers during isometric yoga postures.
    • To identify specific yoga poses that effectively engage the trapezius and serratus anterior muscles.
    • To explore the potential of yoga for shoulder rehabilitation.

    Main Methods:

    • A controlled, cross-sectional laboratory study.
    • Electromyography (EMG) was used to measure muscle activity.
    • Twenty women with prior yoga experience and no shoulder issues participated, performing 15 different yoga postures.

    Main Results:

    • Muscle activation varied widely across yoga postures, ranging from 3% to 57% of maximum voluntary isometric contraction (MVIC).
    • The "locust arms forward" posture showed the highest activation for upper, middle, and lower trapezius muscles.
    • Several poses demonstrated low scapular stabilizer activity, while others showed moderate serratus anterior engagement.

    Conclusions:

    • Scapular muscle strengthening is vital for effective shoulder rehabilitation.
    • Specific yoga postures can activate scapular stabilizer muscles at diverse intensity levels.
    • This research identifies yoga poses that may be beneficial for incorporating into shoulder rehabilitation programs.