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  • Effects of detraining in age-group swimmers performance, energetics and kinematics

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    PYNE169590.pdf (2.032Mb)
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    Accepted Manuscript (AM)
    Author(s)
    Zacca, Rodrigo
    Toubekis, Argyris
    Freitas, Laura
    Silva, Ana Filipa
    Azevedo, Rui
    Vilas-Boas, Joao Paulo
    Pyne, David B
    Castro, Flavio A De S
    Fernandes, Ricardo J
    Griffith University Author(s)
    Pyne, David B.
    Year published
    2019
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    Abstract
    Changes in performance, energetics and kinematics during age-group swimmers off-season inform the prescription of training for the following season. Age-group swimmers (n = 15, age 14.3 ± 0.7 years) of equal maturational stage performed a 400-m front crawl (T400) before and after a four-weeks training cessation period. Performance-related energetic and kinematic variables were obtained controlling for anthropometric changes and non-swimming specific physical activities during off-season. T400 time decreased 3.8% (95%CI 1.4 to 6.1%; p < 0.01; d = 0.90) with non-specific physical activities (1814 ± 1989 MET-min·wk−1) accounting ...
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    Changes in performance, energetics and kinematics during age-group swimmers off-season inform the prescription of training for the following season. Age-group swimmers (n = 15, age 14.3 ± 0.7 years) of equal maturational stage performed a 400-m front crawl (T400) before and after a four-weeks training cessation period. Performance-related energetic and kinematic variables were obtained controlling for anthropometric changes and non-swimming specific physical activities during off-season. T400 time decreased 3.8% (95%CI 1.4 to 6.1%; p < 0.01; d = 0.90) with non-specific physical activities (1814 ± 1989 MET-min·wk−1) accounting for ~40% of the underlying variance (p = 0.01; η2 = 0.40). Stroke rate and stroke index decreased despite similar stroke length and index of coordination values. Although mean response time, amplitude, maximal oxygen uptake, heart rate, total energy expenditure, metabolic power and energy cost were similar, aerobic contribution decreased by ~1.8% (−2.7 to −0.9%; p < 0.01; d = −1.19) and anaerobic lactic contribution increased by ~1.6% (0.8 to 2.5%; p < 0.01; d = 1.08) over the off-season. Impaired performance was mainly associated with a decreased stroke rate (r = −0.85 to −0.61; p ≤ 0.02), increased peak blood lactate (r = −0.52; p = 0.05) and fewer non-swimming specific physical activities performed during the off-season (r = −0.58; p = 0.03). The end-of-season cessation of training yielded moderate impairments in age-group swimmers performance-related energetic and kinematic factors, however non-specific physical activities can minimise fitness losses.
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    Journal Title
    JOURNAL OF SPORTS SCIENCES
    Volume
    37
    Issue
    13
    DOI
    https://doi.org/10.1080/02640414.2019.1572434
    Copyright Statement
    © 2019 Taylor & Francis (Routledge). This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 04 Feb 2019, available online: https://doi.org/10.1080/02640414.2019.1572434
    Subject
    Sports science and exercise
    Curriculum and pedagogy
    Publication URI
    http://hdl.handle.net/10072/386090
    Collection
    • Journal articles

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