Key result
Endurance training in Beagles increases resting blood volume ~13% and lowers post-exercise heart rate.
Why the study?
Does endurance training improve blood volume, heart rate, and left ventricular ejection fraction in Beagles?
Does endurance training improve blood volume, heart rate, and left ventricular ejection fraction in Beagles?
Endurance training in Beagles increases resting blood volume and improves heart rate recovery after exercise without significantly altering resting heart rate or LVEF.
Hypothesis-generating in Beagles; leaves open translation to human cardiovascular physiology or practice.
In Beagles (n = 5) after 7 weeks' endurance training, resting blood volume increased by an average of 13.1%. Resting heart rates were not significantly affected, but heart rates measured 2 minutes after exercise were significantly lower after the endurance training than before. Left ventricular ejection fractions determined by radionuclide angiography from 2 minutes after exercise showed no significant changes in response to a single exercise period or over the 50 days' training.
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Mackintosh et al. (1983) studied this question. Endurance training vs. Before training was evaluated on Resting blood volume. Endurance training for 7 weeks in Beagles increased resting blood volume by 13.1% and lowered post-exercise heart rates, with no significant changes in left ventricular ejection fraction.
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