Abstract
Abstract Objectives This study aimed to investigate the effects of probiotics on inflammatory cytokines, neurotransmitters, and motor functions during different levels of exercise. Methods Female adolescent mice (n=140) were divided into two groups, of which one group was fed probiotics and the other group was not. For both groups, three levels of exercise were conducted: non-exercise, moderate-intensity exercise, and high-intensity exercise. Probiotics acquisition and aerobic treadmill exercise were the main variables during the growth period. We evaluated motor function with a rotarod test and analyzed cytokines and neurotransmitters in the cerebellum. Results In acceleration mode, the moderate and high-intensity exercise groups showed longer running times than the non-exercise groups (P<0.001). Also, the probiotic-ingestion group had longer latency before falling than those who did not take probiotics in both the high-intensity and the non-exercise groups (P=0.002, P=0.002, respectively). In steady-state mode, the non-exercise group showed lower records compared with the moderate and high-intensity exercise groups (P=0.017, P=0.004, respectively). The inflammatory cytokine levels were high in the groups that performed moderate and high-intensity exercises, but the high levels were relieved in those taking probiotics. The GABA concentration was high for the exercise group and the probiotic-ingestion group. Conclusion Taken together, probiotics help improve motor skills during moderate and high-intensity exercise and help relieve inflammatory responses in the brain. Thus, we suggest that probiotics can be a useful supplement for brain and body development during exercise in adolescence.
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