Iranian Journal of

Background: Myokines released from skeletal muscle have multiple metabolic and hypertrophic effects. On the other hand, one of proposed pathways for effects of exercise training on metabolic diseases is calcineurin signaling pathway. With considering to relation between interleukin-6 (IL-6) and calcineurin, the purpose of this study was to investigate whether the resistance training has an effect on mRNA expression of IL-6 myokine and regulator of calcineurin 1(RCAN-1) in skeletal muscle of diabetic rats.

Methods: Thirty two Rats randomly were divided into the control, training, diabetic control and diabetic training groups. Diabetes induced by streptozotocin (STZ). Training groups performed the 17 sessions of resistance training. The IL-6 and RCAN-1 mRNA expression were measured in Soleus skeletal muscle using the Real-time PCR method. Two-way analysis variance was used for statistical analysis. Also, Statistical significance was set at p<0.05.

Results: The results of this study showed that the mRNA expression of RCAN-1 was increased with resistance training in skeletal muscle of training groups (P<0.05). Also, diabetes was decreased expression of RCAN-1 in skeletal muscle of diabetic groups (P<0.001). Moreover, resistance training was increased mRNA expression of IL-6 in skeletal muscle (P=0.08).

Conclusion: With considering to our results, resistance training with direct effects on skeletal muscle could regulate calcineurin pathway in diabetes and concurrent increase in expression of IL-6 myokine. It seems that activation of this signaling pathway with resistance training could maintain skeletal muscle mass in diabetes.

Background: The purpose of this study is to the comparison of the effect of 12 weeks of sprint training and concurrent aerobic and strength training on high sensitive C-reactive protein (hs-CRP), interleukin-6 (IL-6), tumor necrosis factor alpha (TNF-α) and insulin resistance in women with diabetes mellitus (T2DM)

Methods: 52 overweight female type 2 diabetic patients (age; 45-60 years old and fasting blood glucose ≥ 126 mg/dl (7.0 mmol/l)) were assessed for eligibility. Participants were assigned to intense interval training group (N=17), concurrent resistance- endurance training group (N=17) and control group (N=18). The combined strength-endurance group did 12 weeks, three sessions per week endurance training with 60 % of maximal heart rate and two session resistance training with 70 % 1-RM. Intense interval training group did three session/week of 4-10 repetition of all out 30s Wingate on ergometer were included 10 weeks of concurrent resistance- endurance training and intense interval training.

Results: The results showed that following sprint training, there were significant changes in hs-CRP (p<0.001), but it wasn’t significant following concurrent training (p=0.062). According to results, TNF-α change were not significant in intense sprint (p=0.11) and concurrent training (p=0.23). Differences were not significant for the fasting blood glucose in the intense interval training groups (p=0.000). Serum insulin levels showed significant increases in the SIT (p<0.000) and concurrent training (p=0.000) significantly. The data showed significant differences in insulin resistance index (HOMA-IR) in intense interval training (p=0.000) and concurrent resistance- endurance training (p=0.008). ANCOVA test showed no significant difference in fasting blood glucose concentrations (P=0.171).

Conclusion: Intense sprint training compare to concurrent strength-endurance training can have better inflammatory status for patients with type 2diabete.