Related Experiment Video
Updated: Jun 14, 2026
12:37
Surgical Placement of Catheters for Long-term Cardiovascular Exercise Testing in Swine
Published on: February 9, 2016
Brief note about plasma catecholamines kinetics and submaximal exercise in untrained standardbreds
Paolo Baragli1, Sara Pacchini, Domenico Gatta
1Dipartimento di Scienze Fisiologiche, Università degli Studi, Pisa, Italy. pbaragli@vet.unipi.it
Annali Dell'Istituto Superiore Di Sanita
|March 30, 2010
Summary
This study investigated adrenaline and noradrenaline kinetics in horses during exercise. Findings reveal distinct accumulation and clearance patterns for these catecholamines, suggesting different physiological roles during exertion.
Area of Science:
- Equine Exercise Physiology
- Neuroendocrinology
- Biochemistry
Background:
- Catecholamines, including adrenaline and noradrenaline, play crucial roles in the physiological response to exercise.
- Understanding their kinetics during standardized exercise is vital for assessing equine athletic performance and health.
Purpose of the Study:
- To evaluate the kinetics of adrenaline and noradrenaline in untrained standardbred horses during a standardized exercise test.
- To analyze the correlation between adrenaline and noradrenaline levels at varying exercise intensities.
Main Methods:
- Four untrained standardbred horses underwent a standardized treadmill exercise test.
- An automated blood collection system collected samples every 15 seconds to measure catecholamine levels.
- Statistical analysis was performed to determine accumulation rates and correlations.
Main Results:
- Adrenaline and noradrenaline showed exponential accumulation during exercise, with peak average values of 15.0 +/- 3.0 nmol/l and 15.8 +/- 2.8 nmol/l, respectively.
- Correlation coefficients between noradrenaline and adrenaline decreased as exercise intensity increased (from r = 0.909 to r = 0.788).
- Adrenaline and noradrenaline exhibited distinct accumulation and clearance dynamics.
Conclusions:
- The release, distribution, and clearance processes for adrenaline and noradrenaline differ during submaximal exercise in horses.
- These findings suggest distinct physiological roles and regulatory mechanisms for adrenaline and noradrenaline during equine exertion.
Related Concept Videos
01:17Exercise and Cardiac Output
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Sustained exercise increases the muscles' oxygen demand, which can be met...
01:20Exercise and Cardiovascular Response
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
01:29Pathophysiology of Cardiac Performance
Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...