Concentric phase assistance enhances eccentric peak power during flywheel squats: intersession reliability and the linear relationship between concentric and eccentric phases.

Wren, Cion, Beato, Marco, Mcerlain-naylor, Stuart, Dello Iacono, Antonio and De keijzer, Kevin (2023) Concentric phase assistance enhances eccentric peak power during flywheel squats: intersession reliability and the linear relationship between concentric and eccentric phases. International Journal of Sports Physiology and Performance, 18 (4). pp. 428-434. ISSN 1555-0265 (In Press)

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Abstract

Background: It remains unknown if flywheel assisted squats can be reliably utilised to increase power outputs and if such outputs are related. Objectives: Compare assisted and unassisted flywheel squat peak power outputs, determine their reliability and analyse the relationship of the delta difference between peak power outputs during the squats. Methods: Twenty male athletes attended the laboratory six times – performing three sets of eight repetitions of assisted and unassisted squats during 2 familiarisation sessions and then three sets of eight repetitions during experimental sessions 3-6 (2 sessions for unassisted and assisted squat in randomised order, respectively). Results: Concentric and eccentric peak power were significantly greater during assisted squats (both p < 0.001, d = 1.59, d = 1.57, respectively). Rate of perceived exertion (RPE) (p = 0.23) and eccentric:concentric (E:C) ratio (p = 0.094) did not differ between squat conditions. Peak power measures obtained excellent reliability, while RPE and E:C ratio estimates were rated as acceptable to good, with greater uncertainty. A large to very large correlation (r = 0.77) was found between concentric and eccentric peak power delta difference of assisted and unassisted squats. Conclusions: Greater concentric outputs during assisted squats induce greater eccentric outputs and obtain greater mechanical load. Peak power is a reliable metric for monitoring flywheel training, whereas the E:C ratio should be used with caution. Eccentric and concentric peak power are strongly related during flywheel squats, evidencing the need to maximise the concentric output to enhance the eccentric output.

Item Type: Article
Uncontrolled Keywords: flywheel squats, physiology, exercise
Subjects: Q Science > QP Physiology
Divisions: Faculty of Health & Science > Department of Science & Technology
Depositing User: Marco Beato
Date Deposited: 23 Jan 2023 12:43
Last Modified: 04 May 2023 08:39
URI: https://oars.uos.ac.uk/id/eprint/2932

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