[Comparison of aerobic exercise and caloric restriction on serum preptin levels and indicators of insulin resistance in obese sedentary women]

Introduction: preptin is a recently isolated peptide hormone that is co-secreted with insulin from the pancreatic beta-cells. The aim of this study was to compare the effects of aerobic exercise and caloric restriction on serum preptin levels and HOMA-IR in sedentary obese women

Materials and methods: forty women who referred to home health centers were divided into four groups for 16 weeks of follow up: Aerobic exercise [experimental group 1], caloric restriction [experimental group 2], aerobic exercise with caloric restriction [experimental group 3] and the control group. Training programs in experimental group 1 consisted of aerobic training and running on a treadmill for 105.183 +/- 5.63 minutes, 4 times a wk. In experimental group 2, subjects followed a diet with caloric restriction equivalent to physical activity energy expenditure. Subjects in the experimental group 3 used a training program similar to experimental group 1 for 66.85 +/- 5.34 minutes, 3 times a wk and received a diet with half the amount of caloric restriction of experimental group 2

Results: weight, BMI and WHR showed significant reduction in the experimental groups. Serum preptin levels were decreased by 21.97%, 28.32% and 27.11% in experimental groups 1, 2 and 3 respectively. HOMA-IR was decreased significantly in the 3 groups. Significant correlations were seen between changes of preptin and changes of weight, WHR and HOMA-IR [p<0.05]

Conclusion: considering the relationship between preptin and insulin resistance and the influence of aerobic exercise and caloric restriction, preptin may play an effective role in weight management and prevention of diabetes

[Study of sport trauma in men's sport leagues of Kashan during 2008-9]

Athletes participating in sport competitions are faced with the risk of trauma. The purpose of this study was to determine the frequency of trauma injuries in men's sport leagues of Kashan during 2008-9. In this descriptive cross-sectional study, all injuries during sport league competitions were recorded by attending the sport arenas during 2008-9. A total of 160 trauma cases were recorded during 146 events. The highest number of trauma was observed in handball and taekwondo competitions with 45 [25.6%] and 35 [21.9%] cases, respectively. Athletes involved in sport leagues require appropriate training and adequate protection through the use of protective devices to avoid injuries