فهرست مطالب f. darya noosh

Apelin and omentin are adipose tissue-secreted hormones and affect the metabolism.

The aim of this study was to investigate the effects of long-term aerobic activity with different intensities on plasma levels of apelin and omentin in female rats.

This experimental study was conducted on 60 Sprague-Dawley female rats (2 -month-old) in laboratory affiliated to Shiraz University of Medical Sciences during 2014. Blood samples were taken from15 rats in the pre-test group to measure the variables of interest. The remaining rats were divided into three groups based on treadmill speed (12, 14, and 16m/min). After a single 45-min session of treadmill running, blood samples were taken. Data were analyzed using two-way ANOVA.

The plasma levels of apelin and omentin were not significantly different between the three post-test groups. But the difference between the pre-test group and the post-test groups was statistically significant.

With regards to the results, adipokines response (apelin and omentin) to a single-session exercise is not the same and the secretion of each one occurs at a specific intensity and duration threshold of sports activity.

Chemerin is a new Adipokine which is dependent on autocrine and paracrine signals for the differentiation and maturation of fat cells; it also regulates glucose uptake in fat cells and stimulates lipolysis. Therefore، the present study aimed to investigate the effect of two kinds of anaerobic and aerobic exercise programs on changes of chemerin levels in female Sprague Dawley rats.

In this study، 55 rats were randomly divided into two experimental (aerobic and anaerobic) and pre-test groups. Based on the training program، the experimental group rats did aerobic and anaerobic exercises for eight weeks. Dependent t-test was used to investigate the effect of exercise on chemerin levels and independent T-test was utilized in order to determine significant differences among changes of chemerin level in the experimental group.

The results showed that there was a significant difference in chemerin levels after eight weeks of aerobic exercise (p=0/0001)، while no significant difference was observed in the anaerobic group (p=0/11). Furthermore، there was also a significant difference between the amount of chemerin plasma levels in the aerobic and anaerobic groups (p=0/0001).

It was found that chemerin levels are influenced by activities of endurance types. Regarding the same period of time for both exercises (8 weeks)، it may be stated that the duration of each training session (starting from 15 minutes and continued for 60 minutes in aerobic exercises) is a significant factor in changing the production of this hormone.