Abstract
Exercise and diet are important factors for energy balance and appetite regulation. The aim of this study was to investigate the effect of 8 weeks High Intensity Interval Training (HIIT) and vitamin D3 supplementation in sedentary overweight men. Forty-eight participants were randomly assigned to one of the following four groups (n = 12): HIIT + VitD, HIIT + placebo (3 sessions per week, 10 × 1 min interval cycling at 90–100% VO2peak separated by 1 min active recovery at 15% VO2peakfor 8 weeks), Vit D and control groups. Participants received 2,000 IU/day 25 (OH) D3 or placebo. Measurements were taken pre and post training after 10 h overnight fasting. Insulin, weight, BMI and body fat percentage were significantly decreased, but PYY was significantly increased in the HIIT + Vit D and HIIT + placebo groups (p = 0.001 and p = 0.001, respectively) after 8 weeks of HIIT. Insulin (p = 0.009, p = 0.001), weight, BMI and body fat percentage (p = 0.001, p = 0.001) were significantly lower in the HIIT + Vit D and HIIT + placebo groups compared to the Vit D and control groups. However, PYY was significantly higher in the HIIT + Vit D group compared to the Vit D (p = 0.025) and control groups (p = 0.007) and also in the HIIT + placebo group compared to the Vit D (p = 0.037) and control groups (p = 0.032) after 8 weeks of HIIT. The combination of regular HIIT with vitamin D supplementation has a effect on appetite control and body composition.
Highlights
Today, controlling and preventing weight gain is one of the most important factors in preventing disease and mortality in the world [1]
It was revealed that pathways of satiety hormones (PYY) was higher in the post-intervention in High Intensity Interval Training (HIIT) + Vit D group compared to Vit D (P = 0.025), control (P = 0.007) and HIIT + placebo (P = 0.036) groups
The results of present study showed that 8 weeks of HIIT with an intake of 2,000 IU/day of vitamin D3 supplementation significantly reduced the serum levels of PYY and insulin, but no change was observed in the serum levels of acylated ghrelin
Summary
Today, controlling and preventing weight gain is one of the most important factors in preventing disease and mortality in the world [1]. Control of appetite and energy intake is a complex issue and depend on a variety of hormonal-neurological, psychological and even cultural factors. Appetite regulating gut hormones play an important role in hunger and satiety [2]. PYY is an anorexigenic peptide, synthesized from L-cells in the gastrointestinal tract and released into the bloodstream. In this connection, acylated ghrelin an orexigenic gut peptide, is released in the stomach [3].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
