The effect of the chronic constriction injury on Tweak and Fn14 protein in Plantaris muscle of Wistar rats after of endurance, resistance and combined training

Decreasing muscle mass is one of the detraining characteristics that associated with attenuated in muscle strength and muscle performance, and resulting in disability in performing of daily tasks. The purpose of the present study was to investigate the effect of decreased physical activity in the form of chronic constriction injury (CCI) on the Tweak and Fn14 proteins after resistance, endurance and combined exercises. 32 rats were randomly divided into four groups: 1- Control group-CCI (Sham+CCI), 2- Mixed training group-CCI (Mix+CCI), 3- Endurance training group-CCI (TE+CCI), and 4- Resistance training group-CCI (LA+CCI). Mix+CCI, TE+CCI and CCI+SNL groups participated in training program for six weeks. After performing 6 weeks training, chronic constriction injury was implemented for four weeks. Western blotting technique was used to measure proteins. The results extracted by ANOVA and showed that Tweak and Fn14 proteins increased by CCI. The level of Tweak and Fn14 proteins in CCI+La and CCI+Mix groups and also CCI-TE group was significantly lower than Sham+CCI group (P <0.05). One the other hands, the level of Fn14 protein in CCI-LA compared with CCI-TE and CCI-MIX was not significant (P >0.05). According to the findings of the present study, it seems that mice that had resistance training in their training program experienced less atrophy than the group that did only endurance training.