Paper Information

Journal:   IRANIAN JOURNAL OF ENDOCRINOLOGY AND METABOLISM (IJEM)   JUNE-JULY 2016 , Volume 18 , Number 2; Page(s) 105 To 111.
 
Paper: 

THE EFFECT OF INTERVAL EXERCISE IN HYPOXIA ON RESPONSES OF PYY3-36 AND APPETITEIN OVERWEIGHT INDIVIDUALS

 
 
Author(s):  FOROUGHINASAB F.*, HOVANLOO F., AHMADIZAD S.
 
* FACULTY OF PHYSICAL EDUCATION DEPARTMENT OF EXERCISE PHYSIOLOGY, SHAHID BEHESHTI UNIVERSITY, TEHRAN, I.R. IRAN
 
Abstract: 

Introduction: Since obesity and overweight have dramatically increased in recent years, the purpose of this study was to compare the effects of hypoxia on responses of PYY3-36 and the appetite to interval exercise among overweight individuals.
Materials and Methods: Eight healthy male subjects (age, 22.14±2.11 yrs; height, 175.28±7.69 cm; weight, 87.03±5.95 kg; BMI, 28.4±1.5 kg/m2) voluntarily participated in the study and performed an exercise protocols (cycling) in noromxic and hypoxic conditions on two separate sessions (Counterbalance) with a one week interval. Interval exercise included 5 repetitions of 4-min activity at 85%of HRmax, followed by 2-min active restat 50% of HRmax. The environmental and training conditions were kept constant in two sessions, with the exception that the interval exercise was performed with 15% reduction in oxygen partial pressure in a hypoxic trial. Blood samples were taken before and after exercise (10, 20, 40, 60 and 80 minutes) and were analyzed for measuring the PYY3-36 using the ELISA technique.
Results: Environmental conditions did not induce significant effect on PYY3-36 responses to interval exercise (P=0.1), though, exercise increased the PYY3-36, especially in normoxic conditions. In addition, although there was a reduction in the appetite following the two trials, environmental conditions had no significant effect on appetite (p=0.872).
Conclusion: Interval exercises increase circulating levels of PYY3-36 and reduce appetite, irrespective of the environmental conditions (normoxia or hypoxia) in which the exercise is performed.

 
Keyword(s): INTERVAL EXERCISE, HYPOXIA, NORMOXIA, HORMONEPYY3-36, APPETITE, OVERWEIGHT
 
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