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The reliability of force platform data from trotting horses

Published online by Cambridge University Press:  09 March 2007

JA Lynch ,
HM Clayton  and
DR Mullineaux
JA Lynch
Affiliation:
Mary Anne McPhail Equine Performance Center, Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
HM Clayton*
Affiliation:
Mary Anne McPhail Equine Performance Center, Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
DR Mullineaux
Affiliation:
Mary Anne McPhail Equine Performance Center, Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
*
*[email protected]
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Abstract

The aim of the present study was to quantify the inter-day reliability of force platform data from horses at the trot. The subjects were ten horses judged to be sound on the basis of clinical evaluation and similarity of ground reaction force peaks of left and right limbs. The same handler trotted horses in hand for four consecutive days over a force platform at their natural and comfortable velocity between 2.70 and 3.60 m s−1. For each horse, velocity was controlled in a range of±0.15 m s−1. Five contacts per limb were recorded on each day. Custom-written code in MATLAB was used to smooth the data and time-normalize to 101 data points. The agreement boundary was used to determine the reliability of seven force variables. Stance duration, peak vertical force and vertical impulse were the most reliable variables (<10% variability in the mean), while peak braking and propulsive forces and impulses had larger variation across the three days (>20% variability in the mean). Variables with low variability may require fewer animals, trials and days to obtain accurate data while maintaining adequate statistical power. These results may act both as a reference when studying variability in lame horses and as a guide for planning future equine kinetic studies.

Keywords

ground reaction forceagreement boundarystatistical powervariability
Type
Research Article
Information
Equine and Comparative Exercise Physiology , Volume 2 , Issue 2 , May 2005 , pp. 129 - 132
Copyright
Copyright © Cambridge University Press 2005

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References

1Khumsap, S, Clayton, HM and Lanovaz, JL (2001). Effect of walking velocity on ground reaction force variables in the hind limb of clinically normal horses. American Journal of Veterinary Research 62: 901–906.CrossRefGoogle ScholarPubMed
2McLaughlin, RM, Gaughan, EM, Roush, JK and Skaggs, CL (1996). Effects of subject velocity on ground reaction force measurements and stance times in clinically normal horses at the walk and trot. American Journal of Veterinary Research 57: 7–11.CrossRefGoogle ScholarPubMed
3Merkens, HW, Schamhardt, HC, Hartman, W and Kersjes, AW (1986). Ground reaction force patterns of Dutch Warmblood horses at normal walk. Equine Veterinary Journal 18: 207–214.CrossRefGoogle ScholarPubMed
4Merkens, HW and Schamhardt, HC (1988). Distribution of ground reaction forces of the concurrently loaded limbs of the Dutch Warmblood horse at the normal walk. Equine Veterinary Journal 20: 209–213.CrossRefGoogle ScholarPubMed
5Merkens, HW, Schamhardt, HC and van Osch, GJVM (1993). Ground reaction force patterns of Dutch Warmblood horses at normal trot. Equine Veterinary Journal 25: 134–137.CrossRefGoogle ScholarPubMed
6Merkens, HW and Schamhardt, HC (1988). Evaluation of equine locomotion during different degrees of experimentally induced lameness I: lameness model and quantification of ground reaction force patterns of the limbs. Equine Veterinary Journal Supplement 6: 99–106.CrossRefGoogle Scholar
7Merkens, HW and Schamhardt, HC (1988). Evaluation of equine locomotion during different degrees of experimentally induced lameness II: distribution of ground reaction force patterns of the concurrently loaded limbs. Equine Veterinary Journal Supplement 6: 107–112.CrossRefGoogle Scholar
8Williams, GE (2001). Locomotor characteristics of horses with navicular disease. American Journal of Veterinary Research 62: 206–210.CrossRefGoogle ScholarPubMed
9Goodship, AE, Brown, PN, MacFie, HJH, Lanyon, LE and Silver, IA (1983). A quantitative force plate assessment of equine locomotor performance. In: Snow, DH, Persson, SGB & Rose, RJ (eds), Equine Exercise Physiology Cambridge: Granta Publications (pp. 263–270).Google Scholar
10Steiss, JE, Yuill, GT, White, NA and Bowen, JM (1982). Modification of a force plate system for equine gait analysis. American Journal of Veterinary Research 43: 538–540.Google ScholarPubMed
11Rumph, PF, Steiss, JE and West, MS (1999). Interday variation in vertical ground reaction force in clinically normal greyhounds at the trot. American Journal of Veterinary Research 60: 679–683.CrossRefGoogle ScholarPubMed
12Clayton, HM, Bialski, DE, Lanovaz, JL and Mullineaux, DR (2003). Assessment of the reliability of a technique to measure postural sway in horses. American Journal of Veterinary Research 64: 1354–1359.CrossRefGoogle ScholarPubMed
13Bland, JM (2000). An Introduction to Medical Statistics. Oxford: Oxford University Press.Google Scholar
14Mullineaux, DR, Barnes, CA and Batterham, AM (1999). Assessment of bias in comparing measurements: a reliability example. Measurements in Physical Education and Exercise Science 3: 195–205.CrossRefGoogle Scholar
15Vincent, WJ (1999). Statistics in Kinesiology 2nd edn., p. 142Champaign, IL: Human Kinetics.Google Scholar
16Clayton, HM, Schamhardt, HC, Willemen, MA, Lanovaz, JL and Colbourne, GR (2000). Kinematics and ground reaction forces in horses with superficial digital flexor tendonitis. American Journal of Veterinary Research 61: 191–196.CrossRefGoogle Scholar
17Peham, C, Licka, T, Girtler, D and Scheidl, M (2001). The influence of lameness on equine stride length consistency. The Veterinary Journal 162: 153–157.CrossRefGoogle ScholarPubMed