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  • Acute muscle and joint mechanical responses following a high-intensity stretching protocol

    Author(s)
    Freitas, Sandro R
    Andrade, Ricardo J
    Nordez, Antoine
    Mendes, Bruno
    Mil-Homens, Pedro
    Griffith University Author(s)
    Nobrega Andrade, Ricardo J. J.
    Year published
    2016
    Metadata
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    Abstract
    Purpose: A previous study observed a joint passive torque increase above baseline ~30 min after a high-intensity stretching. This study examined the effect of a high-intensity stretching on ankle dorsiflexion passive torque, medial gastrocnemius (MG) shear modulus, and plantar flexors maximal voluntary isometric force (MVIC). Method: Participants (n = 11, age 27.2 ± 6.5 years, height 172.0 ± 10.0 cm, weight 69.5 ± 10.4 kg) underwent two stretching sessions with plantar flexors isometric contractions performed: (1) 5 min before, 1 min after, and every 10 min after stretching (MVC session); (2) 5 min before, and 60 min after ...
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    Purpose: A previous study observed a joint passive torque increase above baseline ~30 min after a high-intensity stretching. This study examined the effect of a high-intensity stretching on ankle dorsiflexion passive torque, medial gastrocnemius (MG) shear modulus, and plantar flexors maximal voluntary isometric force (MVIC). Method: Participants (n = 11, age 27.2 ± 6.5 years, height 172.0 ± 10.0 cm, weight 69.5 ± 10.4 kg) underwent two stretching sessions with plantar flexors isometric contractions performed: (1) 5 min before, 1 min after, and every 10 min after stretching (MVC session); (2) 5 min before, and 60 min after the stretching (no-MVC session). Results: In both sessions, no changes were observed for MG shear modulus (p > 0.109). In the no-MVC session, passive torque decreased 1 min after stretching (−7.5 ± 8.4 %, p = 0.015), but increased above baseline 30 min after stretching (+6.3 ± 9.3 %, p = 0.049). In the MVC session, passive torque decreased at 1 min (−10.1 ± 6.3 %, p < 0.001), 10 min (−6.3 ± 8.2 %, p = 0.03), 20 min (−8.0 ± 9.2 %, p = 0.017), and 60 min (−9.2 ± 12.4 %, p = 0.034) after the stretching, whereas the MVIC decreased at 1 min (−5.0 ± 9.3 %, p = 0.04) and 10 min (−6.7 ± 8.7 %, p = 0.02) after stretching. Conclusion: The ankle passive torque increase 30 min following the stretch was not due to the MG shear modulus response; consequently, response may be due to changes in surrounding connective tissue mechanical properties.
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    Journal Title
    European Journal of Applied Physiology
    Volume
    116
    Issue
    8
    DOI
    https://doi.org/10.1007/s00421-016-3410-2
    Subject
    Sports science and exercise
    Science & Technology
    Life Sciences & Biomedicine
    Physiology
    Sport Sciences
    Elastography
    Publication URI
    http://hdl.handle.net/10072/409003
    Collection
    • Journal articles

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