Familiarisation and reliability of sprint test indices during laboratory and field assessment

Hopker, James G. and Coleman, Damian A and Wiles, Jonathan and Galbraith, Andrew (2009) Familiarisation and reliability of sprint test indices during laboratory and field assessment. Journal of Sports Science and Medicine, 8 . pp. 528-532. ISSN 1303-2968. (Full text available)

PDF - Accepted Version
Download (173kB)
[img]
Preview
Official URL
http://www.jssm.org/vol8/n4/6/v8n4-6pdf.pdf

Abstract

The aim of the study was to assess the reliability of sprint performance in both field and laboratory conditions. Twenty-one male (mean ± s: 19 ± 1 years, 1.79 ± 0.07 m, 77.6 ± 7.1 kg) and seventeen female team sport players (mean ± s: 21 ± 4 years, 1.68 ± 0.07 m, 62.7 ± 4.7 kg) performed a maximal 20-metre sprint running test on eight separate occasions. Four trials were conducted on a non-motorised treadmill in the laboratory; the other four were conducted outdoors on a hard-court training surface with time recorded by single-beam photocells. Trials were conducted in random order with no familiarisation prior to testing. There was a significant difference between times recorded during outdoor field trials (OFT) and indoor laboratory trials (ILT) using a non-motorised treadmill (3.47 ± 0.53 vs. 6.06 ±1.17s; p < 0.001). The coefficient of variation (CV) for time was 2.55-4.22% for OFT and 5.1-7.2% for ILT. During ILT peak force (420.9+87.7N), mean force (147.2+24.7N), peak power (1376.8 ± 451.9W) and mean power (514.8 ± 164.4W), and were measured. The CV for all ILT variables was highest during trial 1-2 comparison. The CV (95% confidence interval) for the trial 3-4 comparison yielded: 9.4% (7.7-12.1%), 7.9% (6.4-10.2%), 10.1% (8.2-13.1%) and 6.2% (5.1-8.0%) for PF, MF, PP and MP and respectively. The results indicate that reliable data can be derived for single maximal sprint measures, using fixed distance protocols. However, significant differences in time/speed over 20-m exist between field and laboratory conditions. This is primarily due to the frictional resistance in the non-motorised treadmill. Measures of force and power during ILT require at least 3 familiarisations to reduce variability in test scores.

Item Type: Article
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Faculties > Social Sciences > School of Sport and Exercise Studies
Depositing User: James Hopker
Date Deposited: 21 Jan 2011 16:58
Last Modified: 22 May 2014 12:53
Resource URI: http://kar.kent.ac.uk/id/eprint/23814 (The current URI for this page, for reference purposes)
  • Depositors only (login required):

Downloads

Downloads per month over past year