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Effects of hoof shape, body mass and velocity on surface strain in the wall of the unshod forehoof of Standardbreds trotting on a treadmill
in Comparative Exercise PhysiologySearch for other papers by J.J. Thomason in
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Search for other papers by W.W. Bignell in
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Search for other papers by D. Batiste in
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Abstract
The purpose of this work is to investigate the effects of body mass (BM), velocity (V), and hoof shape on compressive surface strains in the wall of the front hoof at the trot. Toe angle (TA), heel angle (HA), toe length (TL), medial and lateral wall length (MWL, LWL) and BM were measured for nine adult, unshod Standardbreds. Five rosette gauges were glued around the circumference of the left forehoof of each animal which was then trotted on a treadmill at a set range of velocities from 3.5 to 7.5 m s−1. Analysis of variance (ANOVA) of principal compressive strains 𝜖2 at midstance identified that all primary variables (BM, V, TA, HA, etc.) had a significant effect as did the interactions of TA × HA and BM × TA. These significant variables explained over 96% of the variation in 𝜖2. Multiple regression of 𝜖2 on these variables gave equations which accurately predicted 𝜖2 within 3%, but the individual coefficients did not accurately describe how each variable affected 𝜖2. Further tests using bivariate regression gave equations that enabled 𝜖2 data to be standardized for BM and V at the gauge locations used here. Strain 𝜖2 increased linearly with mass and curvilinearly with velocity (𝜖2 ∝ V + V2), and both caused redistribution of strain to the dorsum and lateral quarter. Variation in each shape variable caused redistribution rather than simple increase or decrease in strains. The primary conclusion with regard to hoof shape is that the effects of change in any one measurement on strain magnitudes are affected by the values of all other measurements. Resolving the interplay among measurements in their effects on 𝜖2 will need a considerably larger sample size than that used here.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 0 | 0 | 0 |
| Gesamttextansichten | 41 | 11 | 2 |
| PDF-Downloads | 53 | 16 | 2 |
Effects of hoof shape, body mass and velocity on surface strain in the wall of the unshod forehoof of Standardbreds trotting on a treadmill
in Comparative Exercise PhysiologySearch for other papers by J.J. Thomason in
Current site
Google Scholar
PubMed
Search for other papers by W.W. Bignell in
Current site
Google Scholar
PubMed
Search for other papers by D. Batiste in
Current site
Google Scholar
PubMed
Search for other papers by W. Sears in
Current site
Google Scholar
PubMed
Abstract
The purpose of this work is to investigate the effects of body mass (BM), velocity (V), and hoof shape on compressive surface strains in the wall of the front hoof at the trot. Toe angle (TA), heel angle (HA), toe length (TL), medial and lateral wall length (MWL, LWL) and BM were measured for nine adult, unshod Standardbreds. Five rosette gauges were glued around the circumference of the left forehoof of each animal which was then trotted on a treadmill at a set range of velocities from 3.5 to 7.5 m s−1. Analysis of variance (ANOVA) of principal compressive strains 𝜖2 at midstance identified that all primary variables (BM, V, TA, HA, etc.) had a significant effect as did the interactions of TA × HA and BM × TA. These significant variables explained over 96% of the variation in 𝜖2. Multiple regression of 𝜖2 on these variables gave equations which accurately predicted 𝜖2 within 3%, but the individual coefficients did not accurately describe how each variable affected 𝜖2. Further tests using bivariate regression gave equations that enabled 𝜖2 data to be standardized for BM and V at the gauge locations used here. Strain 𝜖2 increased linearly with mass and curvilinearly with velocity (𝜖2 ∝ V + V2), and both caused redistribution of strain to the dorsum and lateral quarter. Variation in each shape variable caused redistribution rather than simple increase or decrease in strains. The primary conclusion with regard to hoof shape is that the effects of change in any one measurement on strain magnitudes are affected by the values of all other measurements. Resolving the interplay among measurements in their effects on 𝜖2 will need a considerably larger sample size than that used here.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 0 | 0 | 0 |
| Gesamttextansichten | 41 | 11 | 2 |
| PDF-Downloads | 53 | 16 | 2 |
