Effectiveness of Accentuated Eccentric Loading: Contingent on Concentric Load

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11510%2F21%3A10418404" target="_blank" >RIV/00216208:11510/21:10418404 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=OqpeiO_pN_" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=OqpeiO_pN_</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1123/ijspp.2019-0769" target="_blank" >10.1123/ijspp.2019-0769</a>

Result language

angličtina

Original language name

Effectiveness of Accentuated Eccentric Loading: Contingent on Concentric Load

Original language description

Purpose: Identify acute effects of a single accentuated eccentric (AEL) repetition on subsequent back squat kinetics and kinematics with different concentric loads. Methods: Resistance-trained men (n=21) participated in a counterbalanced crossover design and completed four protocols (sets*repetitions@eccentric/concentric): AEL65, 3*5@120/65% one-repetition maximum (1-RM); AEL80, 3*3@120/80% 1-RM; TRA65, 3*5@65/65% 1-RM; TRA80, 3*3@80/80% 1-RM. During AEL, weight releasers disengaged from the barbell after the eccentric phase of the first repetition and remained off for the remaining repetitions. All repetitions were performed on a force plate with linear position transducers attached to the barbell, from which eccentric and concentric peak and mean velocity, force, and power were derived. Results: Eccentric peak velocity (-0.076+-0.124 m.s-1; p=0.012), concentric peak force (187.8+-284.4 N; p=0.007), eccentric mean power (-145.2+-62.0 W; p=0.028) and eccentric peak power (-328.6+-93.7 W; p=0.002) during AEL65 were significantly greater than TRA65. When collapsed across repetitions, AEL65 resulted in slower eccentric velocity and power during repetition one, but faster eccentric and concentric velocity and power in subsequent repetitions (p&lt;=0.036). When comparing AEL80 to TRA80, concentric peak force (133.8+-56.9 N; p=0.029), eccentric mean power (-83.57+-38.0 W; p=0.040), and eccentric peak power (-242.84+-67.3 W; p=0.002) were enhanced. Conclusions: Including a single supramaximal eccentric phase of 120% 1-RM increased subsequent velocity and power with concentric loads of 65% 1-RM, but not 80% 1-RM. Therefore, AEL is sensitive to the magnitude of concentric loads, which requires a large relative difference to the eccentric load, and weight releasers may not need to be reloaded to induce performance enhancement.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

30306 - Sport and fitness sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Sports Physiology and Performance

ISSN

1555-0265

e-ISSN

—

Volume of the periodical

16

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

66-72

UT code for WoS article

000605190900010

EID of the result in the Scopus database

2-s2.0-85104047209