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Related Experiment Video

Updated: Oct 15, 2025

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Concurrent exercise does not prevent recognition memory deficits induced by beta-amyloid in rats.

Karine Ramires Lima1, Helen Lidiane Schmidt2, Leticia Rossi Daré1

  • 1Physiology Research Group, Stress, Memory and Behavior Lab, Federal University of Pampa, Uruguaiana, RS, Brazil.

Physiology & Behavior
|October 29, 2021
PubMed
Summary

Concurrent exercise, combining running and strength training, did not prevent memory loss in an Alzheimer's disease model. However, running alone effectively protected against cognitive deficits.

Keywords:
Alzheimer's diseaseNeurodegenerationRunningStrengthTraining

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Area of Science:

  • Neuroscience
  • Exercise Physiology
  • Neurodegenerative Diseases

Background:

  • Alzheimer's disease (AD) poses a significant global health challenge.
  • Physical exercise is explored as a potential preventative or therapeutic strategy for AD.
  • Concurrent exercise (combining aerobic and resistance training) is a popular fitness regimen.

Purpose of the Study:

  • To evaluate the efficacy of concurrent exercise in preventing recognition memory deficits in an Alzheimer's disease-like rat model.
  • To investigate the impact of concurrent exercise on hippocampal beta-amyloid (Aβ) induced neurotoxicity.
  • To compare the effects of concurrent exercise versus running exercise alone on cognitive function.

Main Methods:

  • An Alzheimer's disease-like model was induced in Wistar rats via hippocampal beta-amyloid (Aβ) injection.
  • Rats were subjected to different exercise protocols: concurrent exercise (running + strength), running exercise alone, or no exercise.
  • Recognition memory was assessed, and hippocampal levels of reactive oxygen species (ROS) were measured.

Main Results:

  • Concurrent exercise failed to prevent recognition memory deficits in Aβ-injected rats.
  • The concurrent exercise group exhibited elevated levels of reactive oxygen species in the hippocampus.
  • Running exercise administered alone successfully prevented recognition memory impairments in the Aβ model.

Conclusions:

  • Concurrent exercise is not effective in preventing memory deficits in this Alzheimer's disease model.
  • Running exercise alone demonstrates neuroprotective effects against Aβ-induced memory impairment.
  • Further research is needed to understand the mechanisms underlying the differential effects of exercise types on AD pathology.