Effect of load on preferred speed and cost of transport
| Autor: | K. M. Hall, Donald F. Hoyt, Edward A. Cogger, Steven J. Wickler |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Male
Cost of transport Physiology Body Weight Energy metabolism Energetic cost medicine.disease_cause Body weight Gait Running Weight-bearing Weight-Bearing Oxygen Consumption Control theory Physiology (medical) Range (aeronautics) medicine Animals Female Horses O2 consumption Energy Metabolism Mathematics |
| Zdroj: | Journal of Applied Physiology. 90:1548-1551 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.2001.90.4.1548 |
| Popis: | Horses have a tendency to utilize a relatively narrow set of speeds near the middle of a much broader range they are capable of using within a particular gait, i.e., a preferred speed. Possible explanations for this behavior include minimizing musculoskeletal stresses and maximizing metabolic economy. If metabolic economy (cost of transport, CT) and preferred speeds are linked, then shifts in CTshould produce shifts in preferred speed. To test this hypothesis, preferred speed was measured in trotting horses ( n = 7) unloaded on the level and loaded with 19% of their body weight on the level. The preferred speed on the level was 3.33 ± 0.09 (SE) m/s, and this decreased to 3.13 ± 0.11 m/s when loaded. In both conditions (no load and load), the rate of O2consumption ( n = 3) was a curvilinear function of speed that produced a minimum CT(i.e., speed at which trotting is most economical). When unloaded, the speed at which CTwas minimum was very near the preferred speed. With a load, CTdecreased and the minimum was also near the preferred speed of horses while carrying a load. |
| Databáze: | OpenAIRE |
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