Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses
Thoroughbred racehorses have been selectively bred for racing for centuries. The excellent exercise capacity of Thoroughbreds is thought to depend largely on their extraordinarily high cardiopulmonary function. Their high aerobic capacity (VO2max) might be amplified by the exercise-induced hypoxemia...
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| Format: | Article |
| Language: | English |
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Japanese Society of Physical Fitness and Sports Medicine
2013-06-01
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| Series: | Journal of Physical Fitness and Sports Medicine |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jpfsm/2/2/2_163/_pdf/-char/en |
| _version_ | 1818607584607731712 |
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| author | Hajime Ohmura Atsushi Hiraga James H. Jones |
| author_facet | Hajime Ohmura Atsushi Hiraga James H. Jones |
| author_sort | Hajime Ohmura |
| collection | DOAJ |
| description | Thoroughbred racehorses have been selectively bred for racing for centuries. The excellent exercise capacity of Thoroughbreds is thought to depend largely on their extraordinarily high cardiopulmonary function. Their high aerobic capacity (VO2max) might be amplified by the exercise-induced hypoxemia that they experience even during submaximal exercise. In humans and horses, accumulated O2 deficit (AOD) has been the primary approach used to assess net anaerobic capacity during exercise. The exercise-induced hypoxemia Thoroughbreds experience allows an alternative approach to measuring net anaerobic energy utilization using plasma lactate accumulation rate (PLAR). Horses increase their aerobic capacity when breathing hyperoxic gas that eliminates exercise-induced hypoxemia, and PLAR decreases stoichiometrically. Relating the decrease in PLAR to the increase in VO2max yields a quantitative index of how much net aerobic power a horse is utilizing. Comparison in horses of the net anaerobic power estimated by the two methods, AOD and PLAR, shows systematic bias and suggests PLAR may be more accurate. |
| first_indexed | 2024-12-16T14:29:05Z |
| format | Article |
| id | doaj.art-fa1626cfad544383ba831e0c1c3675d5 |
| institution | Directory Open Access Journal |
| issn | 2186-8131 2186-8123 |
| language | English |
| last_indexed | 2024-12-16T14:29:05Z |
| publishDate | 2013-06-01 |
| publisher | Japanese Society of Physical Fitness and Sports Medicine |
| record_format | Article |
| series | Journal of Physical Fitness and Sports Medicine |
| spelling | doaj.art-fa1626cfad544383ba831e0c1c3675d52022-12-21T22:28:17ZengJapanese Society of Physical Fitness and Sports MedicineJournal of Physical Fitness and Sports Medicine2186-81312186-81232013-06-012216316810.7600/jpfsm.2.163jpfsmExercise-induced hypoxemia and anaerobic capacity in Thoroughbred horsesHajime Ohmura0Atsushi Hiraga1James H. Jones2Equine Research Institute, JRAEquine Research Institute, JRADepartment of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, DavisThoroughbred racehorses have been selectively bred for racing for centuries. The excellent exercise capacity of Thoroughbreds is thought to depend largely on their extraordinarily high cardiopulmonary function. Their high aerobic capacity (VO2max) might be amplified by the exercise-induced hypoxemia that they experience even during submaximal exercise. In humans and horses, accumulated O2 deficit (AOD) has been the primary approach used to assess net anaerobic capacity during exercise. The exercise-induced hypoxemia Thoroughbreds experience allows an alternative approach to measuring net anaerobic energy utilization using plasma lactate accumulation rate (PLAR). Horses increase their aerobic capacity when breathing hyperoxic gas that eliminates exercise-induced hypoxemia, and PLAR decreases stoichiometrically. Relating the decrease in PLAR to the increase in VO2max yields a quantitative index of how much net aerobic power a horse is utilizing. Comparison in horses of the net anaerobic power estimated by the two methods, AOD and PLAR, shows systematic bias and suggests PLAR may be more accurate.https://www.jstage.jst.go.jp/article/jpfsm/2/2/2_163/_pdf/-char/enplasma lactate accumulation rateaccumulated o2 deficitenergy cost of locomotion |
| spellingShingle | Hajime Ohmura Atsushi Hiraga James H. Jones Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses Journal of Physical Fitness and Sports Medicine plasma lactate accumulation rate accumulated o2 deficit energy cost of locomotion |
| title | Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses |
| title_full | Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses |
| title_fullStr | Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses |
| title_full_unstemmed | Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses |
| title_short | Exercise-induced hypoxemia and anaerobic capacity in Thoroughbred horses |
| title_sort | exercise induced hypoxemia and anaerobic capacity in thoroughbred horses |
| topic | plasma lactate accumulation rate accumulated o2 deficit energy cost of locomotion |
| url | https://www.jstage.jst.go.jp/article/jpfsm/2/2/2_163/_pdf/-char/en |
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