خلاصة:
Introduction: Ghrelin is a gut-derived peptide that stimulates
appetite and playing a key role in short-term energy
homeostasis. There is a strong correlation between increases
in circulating ghrelin with weight loss and changes in ghrelin
are related to changes in energy availability, include food
intake and exercise expenditure. Thus, the aim of the present
study was to compare the effects of continuous and
discontinuous training on ghrelin concentration of nonathlete,
middle-age woman.
Material & methods: Forty five middle-aged, non-athlete
women voluntarily participated in this study. Subjects were
divided randomly to three groups including: continuous,
discontinuous and control group (each group 15). One day
before the beginning of training program, the blood sample
were taken in fasting state .The two training groups participated in sport activities for eight weeks, three times a
week with 50-70 heart rate/min for duration 60-90 minutes
.The training program of continuous group were performed
in one session and the program of discontinuous group were
performed in two sessions with same time and intensity. 24
hours following the end of the 8th week, all the measurements
were performed similar to the pretest phase. The data was
analyzed using one way analysis of variance.
Results: The fasting ghrelin concentration significantly
increased in both exercise groups in compare with control
group (P<0.001). Weight, also, in discontinuous group was
significantly decreased in compare with control following 8
weeks of exercise training (P<0.05).
Conclusions: Regular exercise training was found to improve
the serum ghrelin concentration and some components of
body composition in non-athlete, middle-age women; thus, it
seems that this type of training can be efficient, safe and
inexpensive way in order to health care of middle aged
women.
ملخص الجهاز:
Effects of different modes of training on ghrelin concentration in normal-weight middle-age women Mohsen Salesi1* and Faegheh Dehganipour2 Received: 3 April 2019/ Accepted: 30 May 2019 (1)* Associate Professor in Exercise Physiology, Department of exercise sciences, College of Education, Shiraz University, Shiraz, Iran.
Results: The fasting ghrelin concentration significantly increased in both exercise groups in compare with control group (P Keywords: Ghrelin, Modes of training, Middle-age women 1.
An aerobic training program at 75-80% of heart rate maximum for 3 times per week, 60 minutes per session, in middle-aged obese or overweight men, had a significant decrease in body mass, but no any changes in fasting ghrelin concentration reported (10).
Collectivity, all of the abovementioned studies were done in either obese and middle-aged women (10), healthy, normal weight young women (7), postmenopausal overweight and obese women (11), or males (9) and these evidences indicated that ghrelin either increases or does not change following exercise training.
characteristics of subjects before and after 8 weeks of training in three study groups {مراجعه شود به فایل جدول الحاقی} * Significant differences P As shown in the Table 2 and Figure 1, the mean of ghrelin in both exercise groups increased in compare with the control group (P Table 2.
Discussion The purpose of this study was to determine the effect of exercise training modes on changes in ghrelin concentration in normal weight middle- aged women.
5. Conclusion In conclusion, current study showed that fasting ghrelin concentration increased in normal weight middle-aged women who participated in two different mode of exercise training in compare with sedentary control group.