The Reliability of a Rotational Power Assessment of the Core

James Zois, Anthony P. Sharp, Kaushik Talukdar, John Cronin

Research output: Contribution to journalOther Journal Articlepeer-review


Context: Most athletic upper-body power generation involves
high levels of neuromuscular activation/coordination of a rotational
nature. Therefore, it is important to assess athletic ability that
replicates the rotational activity of athletes. However, a paucity of
research currently measures rotational power of the core.
Objective: Establish inter-day reliability of chop and lift mean power
output via a linear position transducer on rotational reliant power
Design: Controlled laboratory study.
Setting: Professional cricket training facilities.
Population: Eight male professional cricket players (age= 23±3.38
years, height= 186±10.06 cm, mass= 89.71± 8.12 kg) with a
resistance (>2 years) training background volunteered to participate
in the study.
Intervention: A linear position transducer was attached to the
weight stack of a cable pulley system to determine the peak power
outputs associated with a chop and lift movement. Assessment
occurred on three occasions separated by at least seven days.
Asymmetry, intraclass correlation coefficients (ICCs) and coefficient
of variations (CV) were calculated and used to quantify the absolute
and relative consistency of the testing procedures.
Results: The mean peak power outputs for chop and lift ranged
from 404 - 494W and 277-314W respectively, the power outputs
differing minimally (2.7-6.3%) between the left and right sides.
Coefficients of variation of 7.4% - 19% were reported, with intraclass correlation coefficients of 0.54 - 0.94 observed between
testing occasions.
Conclusion: Mean muscular power output associated with the lift
assessment reported greatest reliability in well trained athletes.
The asymmetry between sides was relatively small suggesting
balanced multi-planar trunk development in the current throwing
athletes. Equipment limitations (load related), training status and
variable selection (mean or peak power) need to be considered
prior to rotational assessment of the core.
It is recommended that the lift movement is utilized in rotational
power assessments, or that greater familiarization is undertaken
when administering the chop assessment.
Core; Trunk; Assessment; Anaerobic; Transverse plane
Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Athletic Enhancement
Issue number5
Publication statusPublished - 16 Oct 2016
Externally publishedYes


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