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Effect of resistance training at different intensities on hippocampal neurotrophic factors and peripheral CCL11 levels in obese mice

  • Woo, Jinhee (Department of Physical Education, College of Arts and Physical Education, Dong-A University) ;
  • Roh, Hee-Tae (Department of Physical Education, College of Arts and Physical Education, Dong-A University) ;
  • Park, Chan-Ho (Department of Leisure and Sport, Dong-Eui University) ;
  • Yoon, Byung-Kon (Department of Physical Education, Dong-Eui University) ;
  • Kim, Do-Yeon (Department of Physical Education, Pusan National University) ;
  • Shin, Ki-Ok (Department of Physical Education, College of Arts and Physical Education, Dong-A University)
  • Received : 2019.09.09
  • Accepted : 2019.09.27
  • Published : 2019.09.30

Abstract

We investigated the effect of moderate- and high-intensity resistance training on hippocampal neurotrophic factors and peripheral CCL11 levels in high-fat diet (HFD)-induced obese mice. C57/black male mice received a 4 weeks diet of normal (control, CON; n = 9) or a high-fat diet (HF; n = 27) to induce obesity. Thereafter, the HF group was subdivided equally into the HF, HF + moderate-intensity exercise (HFME), and HF + high-intensity exercise (HFHE) groups (n = 9, respectively), and mice were subjected to ladder-climbing exercise for 8 weeks. The hippocampal brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) levels were significantly lower in the HF group than in the CON group (p < 0.05). In addition, in the HFME and HFHE groups were significantly higher than in the HF group (p < 0.05). The peripheral CCL11 levels were significantly higher in the HF group than in the CON group (p < 0.05). In addition, in the HFME and HFHE groups were significantly lower than in the HF group (p < 0.05). However, there was no significant difference according to the exercise intensity among the groups. Collectively, these results suggest that obesity can induce down-regulation of neurotrophic factors and inhibition of neurogenesis. In contrast, regardless of exercise intensity, resistance training may have a positive effect on improving brain function by inducing increased expression of neurotrophic factors.

Keywords

References

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