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Exercise training modifies nutrient self-selection in rats

C Larue-Achagiotis1, N Rieth, J Louis-Sylvestre

  • 1Neurobiologie de la Nutrition, Université Pierre et Marie Curie, Paris, France.

Physiology & Behavior
|August 1, 1994
PubMed
Summary
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Exercise training in rats altered their dietary choices, leading to reduced overall intake but increased carbohydrate consumption. Sedentary rats showed increased fat intake, highlighting exercise

Area of Science:

  • Exercise Physiology
  • Nutritional Science
  • Animal Behavior

Background:

  • Limited research exists on exercise training's impact on macronutrient self-selection.
  • Previous observations suggest trained animals may alter their intake of carbohydrates, fats, and proteins.

Purpose of the Study:

  • To investigate the effects of daily treadmill exercise on total energy intake and macronutrient self-selection in adult male rats.
  • To compare dietary intake patterns between exercised rats and two control groups (sedentary and non-exercised).

Main Methods:

  • Adult male rats were subjected to 2 hours of daily treadmill exercise for 20 days.
  • Macronutrient self-selection and total food intake were continuously monitored.
  • Control groups included a sedentary group (pair-fed during exercise) and a weight/intake control group.

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Main Results:

  • Trained rats exhibited lower body weight compared to sedentary and control groups.
  • Overall 24-hour energy intake was reduced in trained rats, primarily due to decreased fat intake, with a concurrent increase in carbohydrate intake.
  • Sedentary rats showed increased fat intake over the experimental period, while trained rats increased daytime protein and carbohydrate consumption.

Conclusions:

  • Exercise training significantly alters macronutrient self-selection in rats, impacting total energy intake.
  • The study indicates a shift towards increased carbohydrate intake and decreased fat intake with exercise.
  • Exercise influences both nocturnal and diurnal feeding patterns, with trained rats increasing daytime food intake.