The need for eccentric speed: A narrative review of the effects of accelerated eccentric actions during resistance-based training

Handford, Matthew, Bright, Thomas, Mundy, Peter, Lake, Jason, Theis, Nicola and Hughes, Jonathan (2022) The need for eccentric speed: A narrative review of the effects of accelerated eccentric actions during resistance-based training. Sports Medicine, 52. pp. 2061-2083. ISSN 0112-1642

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Official URL: https://link.springer.com/article/10.1007/s40279-0...

Abstract

Eccentric training, as a method to enhance athletic performance, is a topic of increasing interest to both practitioners and researchers. However, there is limited data regarding the effects of performing eccentric actions of an exercise at increased velocities. This narrative review aimed to provide greater clarity for eccentric methods and classification with regard to temporal phases of exercises. To achieve the object of the review, key terms were searched using PubMed, SPORTDiscus and Google Scholar databases between March and April 2021 within the years of 1950-2021.Search terms included: (‘fast eccentric’), (‘fast velocity eccentric’), (‘dynamic eccentric’), (‘accentuated eccentric loading’), (‘isokinetic eccentric’), analysing both the acute and chronic effects of accelerated eccentric training on human participants. Of the 26 studies which met inclusion criteria, it was identified that completing eccentric tempos of <2s can increase subsequent concentric one repetition maximum performance, velocity, and power, compared to >4s tempos. Durations of >4s tempo increase time under tension (TUT); whilst reduced tempos allow for greater volume to be completed. Greater TUT leads to larger accumulation of blood lactate, growth hormone and testosterone, when volume is matched to that of the reduced tempos. Overall, evidence supports <2s duration eccentric actions to improve subsequent concentric performance. There is no clear difference between using eccentric tempos of 2–6s if the aim is to increase hypertrophic response and strength. Future research should analyse performing eccentric actions at greater velocities or reduced time durations to determine more factors such as strength response. Tempo studies should aim to complete the same TUT for protocols to determine measures for hypertrophic response.

Item Type:	Article
Depositing User:	Ms Raisa Burton
Date Deposited:	31 Mar 2022 14:04
Last Modified:	05 Jun 2024 13:36
URI:	https://marjon.repository.guildhe.ac.uk/id/eprint/17691
Related URLs:	http://www.spri ... e/journal/40279 (Publisher URL)

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