Acute Effects of Supramaximal Loaded Back Squat Activation on Countermovement Jump Performance, Muscle Mechanical Properties and Skin Surface Temperature in Powerlifters

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11510%2F25%3A10488853" target="_blank" >RIV/00216208:11510/25:10488853 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SYzr6i2QQV" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SYzr6i2QQV</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ejsc.12245" target="_blank" >10.1002/ejsc.12245</a>

Result language

angličtina

Original language name

Acute Effects of Supramaximal Loaded Back Squat Activation on Countermovement Jump Performance, Muscle Mechanical Properties and Skin Surface Temperature in Powerlifters

Original language description

This study aimed to investigate the effects of performing either eccentric-only (ECC) or eccentric-concentric (ECC-CON) back squats (BS) with a supramaximal load on countermovement jump (CMJ) height and relative power output. Changes in front thigh skin surface temperature and mechanical properties (oscillation frequency and stiffness) of the vastus lateralis were also examined. Fourteen male powerlifters participated in this study (age: 22.5+-2.3 years, body weight: 84.2+-11.1 kg, height: 178+-7 cm, training experience: 5.4+-1.6 years, BS one-repetition maximum [1RM]: 177+-22.8 kg). The experimental sessions included 2 sets of 2 BS at 110%1RM of either ECC-CON (load distributed by half on the barbell [55%] and on weight releasers [55%]) or ECC (only eccentric phase of BS) and CTRL with no CA applied. CMJ, mechanical properties, and skin surface temperature were measured before and at the 3rd, 6th, 9th, and 12th min. after each protocol. Only the ECC-CON condition led to a significant increase in CMJ height after individual optimal rest time compared to pre-CA (38.1+-5.2 vs. 39.8+-5.0 cm; p=0.003; effect size [ES]=0.32; Δ=4.9+-5.0%) with a significant rise in skin surface temperature (32.98+-1.24 vs. 33.69+-0.96°C; p=0.006; ES=0.62; Δ=2.2+-2.6%) and no significant changes in mechanical properties of the vastus lateralis. The ECC-CON condition led to a significant acute improvement in CMJ height and an increase in front thigh skin surface temperature among powerlifters. The ECC-CON supramaximal lower-limb PAPE protocol should be effectively used among males representing high levels of lower-limb muscle strength (&gt;2 x body mass).

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

—

OECD FORD branch

30306 - Sport and fitness sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

European Journal of Sport Science

ISSN

1746-1391

e-ISSN

1536-7290

Volume of the periodical

25

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

e12245

UT code for WoS article

001389651100018

EID of the result in the Scopus database

2-s2.0-85213514276