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Rajabi A, Siahkouhian M, Akbarnejad A, Yari M. Comparison between the effects of two different frequencies of aerobic exercise with the same volume and detraining period on the levels of irisin hormone, lipid profiles, and insulin resistance index in obese women with type 2 diabetes . Journals of Birjand University of Medical Sciences 2017; 24 (4) :291-305
URL: http://journal.bums.ac.ir/article-1-2351-en.html

Bachground: Type 2 diabetes is an important public health problem that involves many people. Exercise and physical activity play an important role in preventing and controlling it. Therefore, this study aimed to compare the effects of two different frequencies of aerobic exercise with the same volume and detraining period on the levels of irisin hormone, lipid profiles, and insulin resistance index in obese women with type 2 diabetes.
Materials and Methods: In this quasi-experimental study, 36 obese women with type 2 diabetes were randomly allocated into three groups (n = 12 per group). Group 1 and group 2 performed 8 weeks of intensity aerobic exercise (Group 1=3 times and Group 2=6 times a week, with the same volume) with 60-75 percent of maximum heart rate. Samples were taken before intervention, 48 hours after the first training session, and two weeks after the last training session.
Results: After 8 weeks of intervention, the intergroup results showed that weight, body fat, and body mass index were significantly reduced only in group 1, whereas in both groups, the insulin resistance index reduced and irisin levels increased significantly (P<0.05). One-way ANOVA with LSD post-hoc test indicated a significant difference between the study groups in terms of weight (P=0.036), fat percentage (P=0.001), BMI (P=0.008), insulin resistance (P=0.001), and irisin (P=0.0001) in the post-test phase.
Conclusion: Given the results of this study, the longer duration exercise protocol was of a more significant impact on the control of factors involved in type 2 diabetes than the exercise protocol with more frequent, short-term training sessions. Therefore, it can be concluded that the duration of an exercise program is an effective factor in the prevention and control of type 2 diabetes, which should be considered in the design and planning of exercise.