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  • Effect of concentric and eccentric hamstring training on sprint recovery, strength and muscle architecture in inexperienced athletes

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    Author(s)
    Duhig, Steven J
    Bourne, Matthew N
    Buhmann, Robert L
    Williams, Morgan D
    Minett, Geoffrey M
    Roberts, Llion A
    Timmins, Ryan G
    Sims, Casey KE
    Shield, Anthony J
    Griffith University Author(s)
    Duhig, Steven
    Roberts, Llion A.
    Bourne, Matthew
    Year published
    2019
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    Abstract
    Objectives: To investigate whether five-weeks of concentric (CON) or eccentric (ECC) hamstring strength training have different effects on recovery from sprint running, eccentric strength and architecture of the biceps femoris long head (BF LH ). Design: Cohort study. Methods: Thirty males (age, 22.8 ± 4.1 y; height, 180.1 ± 6.4 cm; weight, 85.2 ± 14.6 kg) were allocated into either a CON or ECC group, both performing nine sessions of resistance training. Prior to and immediately after the five-week intervention, each participant's BF LH fascicle length (FL), pennation angle (PA), muscle thickness (MT), peak isometric KF ...
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    Objectives: To investigate whether five-weeks of concentric (CON) or eccentric (ECC) hamstring strength training have different effects on recovery from sprint running, eccentric strength and architecture of the biceps femoris long head (BF LH ). Design: Cohort study. Methods: Thirty males (age, 22.8 ± 4.1 y; height, 180.1 ± 6.4 cm; weight, 85.2 ± 14.6 kg) were allocated into either a CON or ECC group, both performing nine sessions of resistance training. Prior to and immediately after the five-week intervention, each participant's BF LH fascicle length (FL), pennation angle (PA), muscle thickness (MT), peak isometric KF torque and Nordic eccentric strength were assessed. Post-intervention, participants performed two timed sprint sessions (10 × 80 m) 48 h apart. Blood samples and passive KF torques were collected before, immediately after, 24 h and 48 h after the first sprint session. Results: After five-weeks of strength-training, fascicles lengthened in the ECC (p < 0.001; d = 2.0) and shortened in the CON group (p < 0.001; d = 0.92), while PA decreased for the ECC (p = 0.001; d = 0.52) and increased in the CON group (p < 0.001; d = 1.69). Nordic eccentric strength improved in both ECC (p < 0.001; d = 1.49) and CON (p < 0.001; d = 0.95) groups. No between-group differences were observed in peak isometric strength (p = 0.480), passive KF torques (p = 0.807), sprint performance decrements between sprint sessions (p = 0.317) and creatine kinase (p = 0.818). Conclusions: Despite inducing significant differences in BF LH muscle architecture, there were no significant between group differences in sprint performance decrements across two sprint sessions.
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    Journal Title
    Journal of Science and Medicine in Sport
    Volume
    22
    Issue
    7
    DOI
    https://doi.org/10.1016/j.jsams.2019.01.010
    Copyright Statement
    © 2019 Sports Medicine Australia. Published by Elsevier Ltd. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Sports science and exercise
    Medical physiology
    Health services and systems
    Public health
    Publication URI
    http://hdl.handle.net/10072/383235
    Collection
    • Journal articles

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