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Emotionality changes in rats following chronic exercise.

G D Tharp, W H Carson

Medicine and Science in Sports

|January 1, 1975

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Chronic endurance exercise, like running and swimming, significantly lowers emotionality in male rats. This study demonstrates exercise

Area of Science:

Behavioral Neuroscience
Exercise Physiology

Background:

Emotionality is a key behavioral trait influencing stress response.
The impact of chronic exercise on animal emotionality requires further investigation.

Purpose of the Study:

To investigate the effects of chronic endurance exercise on the emotionality of male albino rats.
To compare the effects of different exercise modalities (running, swimming) versus non-exercise controls.

Main Methods:

Five groups of male albino rats were used: Controls, Runners, Walkers, Swimmers, and Waders.
Runners and Swimmers underwent 8 weeks of physical training, while Walkers and Waders experienced handling without training.
Emotionality was assessed using the tunnel emergence test and open field test.

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Main Results:

The tunnel emergence test was too stressful for the rat strain, yielding inconclusive data.
Open field tests showed that Control rats had longer latency times, indicating reduced emotionality in handled groups.
Runners and Swimmers entered significantly more squares, supporting the hypothesis that exercise lowers emotionality.

Conclusions:

Chronic endurance exercise, specifically running and swimming, effectively reduces emotionality in male rats.
Handling and exposure to exercise routines, even without physical training, can decrease emotionality.
Further research is needed to refine emotionality assessment methods in rats.