Abstract
Reasons for performing study: Several studies have indicated that even low-intensity warm-up increases V̇O2max transport kinetics and that high-intensity warm-up may not be needed in horses. However, conventional warm-up exercise for Thoroughbred races is more intense than those utilised in previous studies of equine warm-up responses.Objectives: To test the hypothesis that warm-up exercise at different intensities alters the kinetics and total contribution of aerobic power to total metabolic power in subsequent supramaximal (sprint) exercise in Thoroughbred horses. Methods: Nine well-trained Thoroughbreds ran until fatigue at 115% of maximal oxygen consumption (V̇O2max) 10 min after warming-up under each of 3 protocols of equal running distance: 400 s at 30% V̇O2max (LoWU), 200 s at 60% V̇O2max (MoWU) and 120 s at 100% V̇O2max (HiWU). Variables measured during exercise were rates of O2 and CO2 consumption/production (V̇O2,V̇OCO2), respiratory exchange ratio (RER), heart rate, blood lactate concentration and accumulation rate and blood gas variables. Results: V̇O2max was significantly higher in HiWU than in LoWU at the onset of the sprint exercise and HR was significantly higher in HiWU than in LoWU throughout the sprint. Accumulation of blood lactate, RER, Paco2 and Pv̄CO2 in the first 60 s were significantly lower in HiWU than in LoWU and MoWU. There were no significant differences in stroke volume, run time or arterial-mixed venous O2 concentration.Conclusions: These results suggest HiWU accelerates kinetics and reduces reliance on net anaerobic power compared with LoWU at the onset of the subsequent sprint.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 33-39 |
| Number of pages | 7 |
| Journal | Equine Veterinary Journal |
| Volume | 42 |
| Issue number | SUPPL. 38 |
| DOIs | |
| State | Published - Nov 2010 |
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Keywords
- Aerobic power
- Horse
- Supramaximal exercise
- V̇okinetics
- Warm-up
ASJC Scopus subject areas
- Equine
Cite this
Effects of three warm-up regimens of equal distance on V o2 kinetics during supramaximal exercise in Thoroughbred horses. / Mukai, K.; Hiraga, A.; Takahashi, T.; Ohmura, H.; Jones, James H.
In: Equine Veterinary Journal, Vol. 42, No. SUPPL. 38, 11.2010, p. 33-39.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of three warm-up regimens of equal distance on V o2 kinetics during supramaximal exercise in Thoroughbred horses
AU - Mukai, K.
AU - Hiraga, A.
AU - Takahashi, T.
AU - Ohmura, H.
AU - Jones, James H
PY - 2010/11
Y1 - 2010/11
N2 - Reasons for performing study: Several studies have indicated that even low-intensity warm-up increases V̇O2max transport kinetics and that high-intensity warm-up may not be needed in horses. However, conventional warm-up exercise for Thoroughbred races is more intense than those utilised in previous studies of equine warm-up responses.Objectives: To test the hypothesis that warm-up exercise at different intensities alters the kinetics and total contribution of aerobic power to total metabolic power in subsequent supramaximal (sprint) exercise in Thoroughbred horses. Methods: Nine well-trained Thoroughbreds ran until fatigue at 115% of maximal oxygen consumption (V̇O2max) 10 min after warming-up under each of 3 protocols of equal running distance: 400 s at 30% V̇O2max (LoWU), 200 s at 60% V̇O2max (MoWU) and 120 s at 100% V̇O2max (HiWU). Variables measured during exercise were rates of O2 and CO2 consumption/production (V̇O2,V̇OCO2), respiratory exchange ratio (RER), heart rate, blood lactate concentration and accumulation rate and blood gas variables. Results: V̇O2max was significantly higher in HiWU than in LoWU at the onset of the sprint exercise and HR was significantly higher in HiWU than in LoWU throughout the sprint. Accumulation of blood lactate, RER, Paco2 and Pv̄CO2 in the first 60 s were significantly lower in HiWU than in LoWU and MoWU. There were no significant differences in stroke volume, run time or arterial-mixed venous O2 concentration.Conclusions: These results suggest HiWU accelerates kinetics and reduces reliance on net anaerobic power compared with LoWU at the onset of the subsequent sprint.
AB - Reasons for performing study: Several studies have indicated that even low-intensity warm-up increases V̇O2max transport kinetics and that high-intensity warm-up may not be needed in horses. However, conventional warm-up exercise for Thoroughbred races is more intense than those utilised in previous studies of equine warm-up responses.Objectives: To test the hypothesis that warm-up exercise at different intensities alters the kinetics and total contribution of aerobic power to total metabolic power in subsequent supramaximal (sprint) exercise in Thoroughbred horses. Methods: Nine well-trained Thoroughbreds ran until fatigue at 115% of maximal oxygen consumption (V̇O2max) 10 min after warming-up under each of 3 protocols of equal running distance: 400 s at 30% V̇O2max (LoWU), 200 s at 60% V̇O2max (MoWU) and 120 s at 100% V̇O2max (HiWU). Variables measured during exercise were rates of O2 and CO2 consumption/production (V̇O2,V̇OCO2), respiratory exchange ratio (RER), heart rate, blood lactate concentration and accumulation rate and blood gas variables. Results: V̇O2max was significantly higher in HiWU than in LoWU at the onset of the sprint exercise and HR was significantly higher in HiWU than in LoWU throughout the sprint. Accumulation of blood lactate, RER, Paco2 and Pv̄CO2 in the first 60 s were significantly lower in HiWU than in LoWU and MoWU. There were no significant differences in stroke volume, run time or arterial-mixed venous O2 concentration.Conclusions: These results suggest HiWU accelerates kinetics and reduces reliance on net anaerobic power compared with LoWU at the onset of the subsequent sprint.
KW - Aerobic power
KW - Horse
KW - Supramaximal exercise
KW - V̇okinetics
KW - Warm-up
UR - http://www.scopus.com/inward/record.url?scp=78249262098&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78249262098&partnerID=8YFLogxK
U2 - 10.1111/j.2042-3306.2010.00227.x
DO - 10.1111/j.2042-3306.2010.00227.x
M3 - Article
C2 - 21058980
AN - SCOPUS:78249262098
VL - 42
SP - 33
EP - 39
JO - Equine veterinary journal. Supplement
JF - Equine veterinary journal. Supplement
SN - 2042-3306
IS - SUPPL. 38
ER -