Skip to main content
Article
Force-Time Differences between Ballistic and Non-Ballistic Half-Squats
Sports
  • Timothy J. Suchomel, Carroll University
  • Christopher B. Taber, Sacred Heart University
  • Christopher J. Sole, Milligan College
  • Michael H. Stone, East Tennessee State University
Document Type
Article
Publication Date
8-12-2018
Description

The purpose of this study was to examine the force-time differences between concentric-only half-squats (COHS) performed with ballistic (BAL) or non-ballistic (NBAL) intent across a range of loads. Eighteen resistance-trained men performed either BAL or NBAL COHS at 30%, 50%, 70%, and 90% of their one repetition maximum (1RM) COHS. Relative peak force (PF) and relative impulse from 0–50 ms (Imp50), 0–90 ms (Imp90), 0–200 ms (Imp200), and 0–250 ms (Imp250) were compared using a series of 2 × 4 (intent × load) repeated measures ANOVAs with Bonferroni post hoc tests. Cohen’s d effect sizes were calculated to provide measures of practical significance between the BAL and NBAL COHS and each load. BAL COHS produced statistically greater PF than NBAL COHS at 30% (d = 3.37), 50% (d = 2.88), 70% (d = 2.29), and 90% 1RM (d = 1.19) (all p < 0.001). Statistically significant main effect differences were found between load-averaged BAL and NBAL COHS for Imp90 (p = 0.006, d = 0.25), Imp200 (p = 0.001, d = 0.36), and Imp250 (p < 0.001, d = 0.41), but not for Imp50 (p = 0.018, d = 0.21). Considering the greater PF and impulse observed during the BAL condition, performing COHS with BAL intent may provide a favorable training stimulus compared to COHS performed with NBAL intent.

Disciplines
Copyright Statement

© 2018 by the authors. This document was originally published in Sports.

Creative Commons License
Creative Commons Attribution 4.0 International
Citation Information
Timothy J. Suchomel, Christopher B. Taber, Christopher J. Sole and Michael H. Stone. "Force-Time Differences between Ballistic and Non-Ballistic Half-Squats" Sports Vol. 6 Iss. 3 (2018) p. 79 - 79 ISSN: 2075-4663
Available at: http://works.bepress.com/michael-stone/376/