The influence of back squat and countermovement jump exercises with and without elastic band resistance on subsequent jump performance

Minas A Mina*, Anthony J Blazevich, Themistoklis Tsatalas, Giannis Giakas, C Kokkotis, V Sideris, Anthony D Kay

*Corresponding author for this work

Research output: Contribution to ConferencePosterpeer-review

Abstract

Introduction: Preconditioning the muscle by performing maximal or near maximal voluntary contractions using elastic band (EB) resistance in combination with free-weight resistance (FWR) can increase subsequent force production and performance. However, such improvements are often reported after limited or no warm-up (1) and the impact of different conditioning contractions at different loads requires further investigation. Therefore, the aim of the present study was to examine the acute effects of conditioning EB exercises (back squat and countermovement jump) following a comprehensive warm-up on subsequent countermovement jump (CMJ) height performance.

Methods: Fifteen active men (age = 21.7 ± 1.1 y, height = 1.8 ± 0.1 m, mass = 77.6 ± 2.6 kg) volunteered for the study and completed four conditions (EB50%, EB85%, FWR50%, FWR85%) in a randomised order each separated by 48 h. During each trial, participants performed a comprehensive warm-up of 5 min cycling, 10 continuous unloaded squats, 5 continuous CMJs at ~70% of perceived maximum, followed by maximal jumps performed every 30 s until 3 jumps were within 3% of maximum jump height. Participants then performed 5 repetitions of either EB- or FWR-loaded CMJs at 50% 1-RM or 3 repetitions of either EB- or FWR-loaded back squat at 85% of 1-RM (35% of load generated from elastic resistance during EB). CMJs were then performed 30 s, 4 min, 8 min, and 12 min later.

Results: No change in any variable was found after both FWR warm-up conditions (p > 0.05). Significant increases (p < 0.05) in CMJ height (4.6-8.0%) and peak power (3.1-5.1%) were observed in the EB50% condition at 30 s and 4 min; no changes were found at 8 min and 12 min. CMJ height (5.6-6.5%) and peak power (4.4-6.0%) were also significantly increased in the EB85% condition at 30 s, 4 min and 8 min; no changes were found at 12 min.

Discussion: The lack effect of the free-weight conditioning contractions suggests that the comprehensive task-specific warm-up routine mitigated any further performance augmentation. However, the improved CMJ performance following the use of EB is indicative that specific alterations in force-time properties of warm-up exercises may further improve performance. The use of heavy squat lifts or loaded CMJs with elastic band resistance result in similar increases CMJ performance following a comprehensive warm-up, although the heavier loading resulted in a more prolonged improvement in performance indicative of an intensity-dependent effect.

References
1. Marshall et al. (2019). J Strength Cond Res. 33(6):1551-1556.
Original languageEnglish
Number of pages1
Publication statusPublished - 31 Aug 2022
Event 27th Annual Congress of the European College of Sport Science - FIBES SEVILLA Conference Centre, Seville, Spain
Duration: 31 Aug 20222 Sep 2022
https://sport-science.org/index.php/congress/ecss-sevilla-2022

Conference

Conference 27th Annual Congress of the European College of Sport Science
Country/TerritorySpain
CitySeville
Period31/08/222/09/22
Internet address

Fingerprint

Dive into the research topics of 'The influence of back squat and countermovement jump exercises with and without elastic band resistance on subsequent jump performance'. Together they form a unique fingerprint.

Cite this