Thesis
Retest reliability of concentric-phase velocity during the jammer punch throw with different loads in combat sports athletes
Masters by Research, Murdoch University
2026
DOI:
https://doi.org/10.60867/00000175
Abstract
Purpose: The objectives of this thesis were to: 1) critically examine current methods used to assess upper-body striking performance for mixed martial artists, with a focus on punch velocity measurement; and 2) investigate the retest reliability of concentric-phase peak velocity during the jammer punch throw (JPT) across multiple external loads in trained combat sports athletes. Methods: Twenty trained combat sports athletes (three female; age: 26.7 ± 5.8 y; body mass: 71.1 ± 7.4 kg) completed three testing sessions over consecutive weeks. Session one served as familiarisation, and sessions two and three were used for reliability analysis. During each session, subjects performed the JPT with each arm under four loading conditions (0%, 10%, 20%, and 30% of body mass) added to the jammer arm, with peak concentric velocity measured using a linear position transducer (LPT). Reliability was assessed using Bland-Altman analysis, intraclass correlation coefficients (ICC2,1), and coefficients of variation (CV) against a priori thresholds of ICC2,1 ≥ 0.80 and CV ≤ 10%. Results: Peak concentric velocity demonstrated good retest reliability for the non-dominant arm at all loads; ICC2,1: 0.83 to 0.90; and CV: 3.5 to 5.2%. For the dominant arm, ICC2,1 met the 0.80 threshold, reaching 0.85 in the unloaded condition and ranging from 0.77 to 0.79 under load; CV: 4.9 to 5.8%. Mean bias was negligible for both arms (-0.09 to 0.12 m・s⁻1). The 95% limits of agreement (LoA) ranged from ± 0.44 to ± 0.68 m・s⁻1 for the dominant arm and ± 0.36 to ± 0.52 m・s⁻1 for the non-dominant arm. Conclusion: Peak velocity during the JPT demonstrates good retest reliability across loads for the non-dominant arm and in the unloaded condition for the dominant arm among trained combat sports athletes, with lower between-session variability for the non-dominant arm, supporting its use to assess upper-body ballistic performance in applied strength and conditioning settings.
Details
- Title
- Retest reliability of concentric-phase velocity during the jammer punch throw with different loads in combat sports athletes
- Authors/Creators
- Jodi Wilkes
- Contributors
- Paul Goods (Supervisor) - Murdoch University, School of Allied HealthBrendan Scott (Supervisor) - Murdoch University, Centre for Healthy AgeingBrook Galna (Supervisor) - Murdoch University, Centre for Healthy Ageing
- Awarding Institution
- Murdoch University; Masters by Research
- Identifiers
- 991005922518607891
- Murdoch Affiliation
- School of Allied Health
- Resource Type
- Thesis
- Note
- Research Masters with Training
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