Effect of three different warm-up regimens on heat balance and oxygen consumption of thoroughbred horses.

The research article investigates how different warm-up exercises impact heat loss and oxygen consumption among Thoroughbred horses. The different warm-up regimens conducted were no warm-up, light warm-up, and intense warm-up.

Background and Method

• The research was performed by observing the effect of three contrasting warm-up regimens on Thoroughbred horses.
• The horses were exercised at 105% of their maximal oxygen uptake until they were fatigued.
• The three warm-up regimens included: no warm-up, a basic warm-up, and a thorough warm-up that increased the central venous temperature to more than 39.5 degrees Celsius.

Results and Findings

• The post-exercise results indicated different amounts of heat were generated in response to each of the varying warm-up regimens.
• No warm-up regimen generated approximately 12.79 MJ of heat, the light warm-up produced about 15.10 MJ of heat, while intense warm-up generated around 18.40 MJ of heat.
• As for the heat generated, 17.5% (no warm-up), 17.2% (light warm-up), and 17.4% (intense warm-up) remained as stored heat after 20 minutes of active recovery.
• The study reported differing percentage of heat loss from the respiratory system for the three varying warm-up routines, with heat losses of 63.6%, 33.7%, and 40.3% respectively.
• The researchers proposed that the remaining heat loss was likely due to sweat evaporation. This led to the estimation of heat loss by sweating at 14.9%, 49.1%, and 42.3% for no warm-up, light, and intense warm-ups respectively.
• This heat loss through sweat was then estimated to have resulted in evaporation of 0.8, 3.1, and 3.0 liters of sweat for no warm-up, light, and intense warm-ups respectively.

Conclusion

• The researchers found significant reductions in both oxygen consumption during exercise and heart rates post-exercise in the horses that underwent either of the two warm-up regimens compared to those that did not do any warm-up.
• This study implies that engaging a horse in proper warm-up exercises before exertion can have beneficial effects, including better heat and oxygen management.