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Related Experiment Video

Updated: May 30, 2026

Simultaneous Detection of c-Fos Activation from Mesolimbic and Mesocortical Dopamine Reward Sites Following Naive Sugar and Fat Ingestion in Rats

Simultaneous Detection of c-Fos Activation from Mesolimbic and Mesocortical Dopamine Reward Sites Following Naive Sugar and Fat Ingestion in Rats

Published on: August 24, 2016

Calorie supply does not alleviate running-based taste aversion learning in rats.

Sadahiko Nakajima¹

¹Department of Psychological Science, Kwansei Gakuin University, Nishinomiya, 662-8501, Japan. nakajima@kwansei.ac.jp

|August 17, 2011

Summary

Running-induced taste aversion in rats is not alleviated by calorie intake, challenging the energy expenditure hypothesis. This suggests other mechanisms may drive taste aversion learning following exercise.

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Area of Science:

Neuroscience
Behavioral Psychology
Animal Models

Background:

Voluntary running can lead to taste aversion learning in rats.
A prominent hypothesis suggests this aversion is driven by energy expenditure during exercise.
This energy expenditure hypothesis predicts that caloric intake should reduce running-induced taste aversion.

Purpose of the Study:

To investigate the role of energy expenditure in taste aversion learning induced by voluntary running.
To test whether caloric supplementation alleviates taste aversion established by running.
To examine if the type of substance (caloric vs. non-caloric) influences aversion learning after running.

Main Methods:

Rats were allowed to run voluntarily and subsequently exposed to either a caloric (sucrose) or non-caloric (saccharin) taste solution.
In subsequent experiments, rats received calorie supplements (glucose tablets) after running sessions.
Taste aversion was measured by quantifying the consumption of the presented solutions.

Main Results:

Taste aversion to both sucrose and saccharin solutions was equivalent after running, contradicting the energy expenditure hypothesis.
Post-session calorie supply via glucose tablets did not alleviate the established taste aversion to salty water.
These findings indicate that energy expenditure may not be the primary mechanism driving running-induced taste aversion.

Conclusions:

The energy expenditure hypothesis is not supported by the presented findings.
Caloric supplementation does not mitigate taste aversion learned after voluntary running.
Alternative mechanisms beyond energy compensation likely underlie taste aversion learning associated with exercise in rats.