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Updated: Jul 24, 2025

A Method to Study the Impact of Chemically-induced Ovarian Failure on Exercise Capacity and Cardiac Adaptation in Mice
Published on: April 7, 2014
Combined Exercise Training Promotes More Benefits on Cardiovascular Autonomic Modulation in Ovariectomized Rats Than
Nicolas Da Costa-Santos1, Gabrielly Minguta Santos Costa2, Adriano Dos-Santos1
1Human Movement Laboratory, São Judas University, São Paulo, Brazil.
Combined exercise training in ovariectomized rats improved cardiovascular autonomic modulation and baroreflex sensitivity more effectively than aerobic or resistance training alone. This approach offers significant benefits for managing cardiovascular risks post-ovarian deprivation.
Area of Science:
- Physiology
- Exercise Science
- Cardiovascular Health
Background:
- Ovarian deprivation increases cardiovascular risk, exacerbated by sedentary lifestyles.
- Exercise, particularly resistance and combined training, is recommended for postmenopausal women to prevent neuromuscular decline.
- Limited experimental data exists on the cardiovascular effects of different exercise types in ovariectomized animal models.
Purpose of the Study:
- To investigate if combined aerobic and resistance training is more effective than individual training types in improving cardiovascular autonomic modulation and baroreflex sensitivity in ovariectomized rats.
- To assess the impact of different exercise regimes on muscle mass, autonomic function, and baroreflex sensitivity in a model of ovarian deprivation.
Main Methods:
- Ovariectomized (Ovx) rats were divided into sedentary (C), Ovx, aerobic training (OvxAT), resistance training (OvxRT), and combined training (OvxCT) groups.
- Exercise interventions lasted 8 weeks, with combined training alternating modalities daily.
- Cardiovascular autonomic modulation, baroreflex sensitivity, arterial pressure, glycemia, and insulin tolerance were evaluated.
Main Results:
- Combined training uniquely enhanced baroreflex sensitivity for tachycardic responses and reduced all systolic blood pressure variability parameters.
- Both aerobic and combined training groups (OvxAT, OvxCT) exhibited lower systolic, diastolic, and mean arterial pressures.
- Exercise training, particularly combined, improved cardiac autonomic modulation.
Conclusions:
- Combined training is superior to isolated aerobic or resistance training in improving cardiovascular autonomic modulation and baroreflex sensitivity in ovariectomized rats.
- This integrated approach effectively mitigates cardiovascular risks associated with ovarian deprivation.
- Combined training offers a promising strategy for enhancing cardiovascular health in postmenopausal states.
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