Journal
NEUROSCIENCE LETTERS
Volume 783, Issue -, Pages -Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2022.136707
Keywords
c-Fos; Exercise type; Hippocampus; Neural activation; Rotarod exercise; Treadmill exercise
Categories
Funding
- JSPS KAKENHI [17H04754]
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The effects of exercise on the hippocampus are influenced by exercise conditions, with exercise intensity being a dominant factor. This study found that treadmill exercise at a moderate intensity more efficiently activates hippocampal neurons compared to intensity-matched rotarod exercise. Therefore, exercise type is another important factor affecting the effects of exercise on the hippocampus.
The effects of exercise on the hippocampus depend on exercise conditions. Exercise intensity is thought to be a dominant factor that influences the effects of exercise on the hippocampus; however, it is uncertain whether the type of exercise influences its effectiveness. This study investigated whether the effect of an acute bout of exercise on hippocampal neuronal activation differs between two different types of exercise: treadmill and rotarod exercise. The intensities of both exercises were matched at just below the lactate threshold (LT), based on blood lactate concentration. Immunohistochemical examination of c-Fos, a marker of neuronal activation, revealed that treadmill exercise at 15 m/min (T15) significantly increased c-Fos expression in all subfields of the hippocampus (dentate gyrus DG, CA1, CA3), but rotarod exercise at 30 rpm (R30) did not, as compared with the respective control groups. These results demonstrate that moderate treadmill exercise more efficiently evokes hippocampal neuronal activation than does intensity-matched rotarod exercise. This suggests that exercise type is another important factor affecting the effects of exercise on the hippocampus.
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