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Hippocampal Neurogenesis via Light-Intensity Running and Its Mechanism.

Koshiro Inoue¹, Hideaki Soya^2,3,4

¹Center for Education in Liberal Arts and Sciences/School of Rehabilitation Sciences, Health Sciences University of Hokkaido, Hokkaido, Japan. ikoshiro@hoku-iryo-u.ac.jp.

Advances in Neurobiology

|September 26, 2025

Summary

This summary is machine-generated.

Exercise intensity impacts adult hippocampal neurogenesis (AHN) and brain function. Treadmill running models reveal how varying exercise levels, defined by lactate threshold (LT), affect new neuron growth and cognitive enhancement.

Keywords:

Adult hippocampal neurogenesis Exercise intensity Hippocampal function Hypothetical mechanisms Lactate threshold Treadmill running

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Area of Science:

Neuroscience
Exercise Physiology

Background:

Adult hippocampal neurogenesis (AHN) generates new neurons in the dentate gyrus (DG).
Exercise enhances AHN and hippocampal function via neuroplasticity.
Previous studies often lacked controlled exercise parameters.

Purpose of the Study:

To investigate the intensity-dependent effects of exercise on AHN and hippocampal function.
To explore the molecular mechanisms underlying exercise-induced neurogenesis.
To utilize treadmill running (TR) for precise exercise condition control.

Main Methods:

Utilizing treadmill running (TR) models for controlled exercise.
Defining exercise intensity based on lactate threshold (LT).
Analyzing molecular factors regulating AHN and hippocampal function.

Main Results:

Exercise intensity significantly influences AHN and hippocampal function.
Light-intensity exercise (below LT) and vigorous-intensity exercise (above LT) have distinct effects.
Specific molecular pathways are modulated by exercise intensity.

Conclusions:

Precise control of exercise intensity, particularly using TR, is crucial for understanding AHN.
Lactate threshold (LT) provides a framework for defining exercise intensity effects.
Findings inform the development of targeted exercise prescriptions for cognitive health.