Cardiorespiratory and metabolic effects of walking, standing, and standing with a splint during the recuperative period from maximal exercise in horses.

The research article investigates how different post-exercise methods, specifically walking, standing, or standing with a limb splint, affect the recovery process of horses after intense exercise. The key finding is that walking after a workout promotes faster recovery and restoration of regular bodily functions compared to standing still.

Methodology

• The study involved six adult Thoroughbred horses with weights ranging from 435 to 542 kg.
• The horses were initially trained on a treadmill to achieve a uniform level of fitness.
• Following this, the treadmill speed required for each horse to operate at 120% of its maximal oxygen capacity was determined.
• The identified speed was then used in simulated races conducted every 14 days.
• All horses were equipped for collecting arterial and mixed venous blood samples to measure acid-base status, metabolite concentrations, and cardiopulmonary indices.
• The horses were made to exercise until they showed signs of fatigue or up to a maximum of 2 minutes, maintaining a speed that induced 120% of their maximum oxygen uptake.
• Post-exercise recovery methods used for analysis included: walking at 1.8 m/s for 30 minutes then standing for the rest of the 90-minute trial; standing stationary for 90 minutes; and standing stationary for 90 minutes with a splint on the right forelimb.

Results and Conclusions

• The data revealed that walking significantly increased cardiac output during the recovery phase and enabled quicker recuperation of normal acid-base status and return of blood lactate concentration to initial values.
• This implies that restricting a horse’s movement after high-intensity exercise can slow down its recovery process.
• Most of the measured parameters were back to normal by the 60-minute mark following the workout.
• All recorded cardiopulmonary indices reinstated to baseline values 90 minutes after the exercise.
• The study therefore concludes that horses not allowed to walk during recovery from exercise might face an extended recovery period.