AUTHOR=Sheikholeslami-Vatani Dariush , Rostamzadeh Naser 

TITLE=Changes in Appetite-Dependent Hormones and Body Composition After 8 Weeks of High-Intensity Interval Training and Vitamin D Supplementation in Sedentary Overweight Men

JOURNAL=Frontiers in Nutrition

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.827630

DOI=10.3389/fnut.2022.827630

ISSN=2296-861X

ABSTRACT=<p>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 D<sub>3</sub> supplementation in sedentary overweight men. Forty-eight participants were randomly assigned to one of the following four groups (<italic>n</italic> = 12): HIIT + VitD, HIIT + placebo (3 sessions per week, 10 × 1 min interval cycling at 90–100% VO<sub>2peak</sub> separated by 1 min active recovery at 15% VO<sub>2peak</sub>for 8 weeks), Vit D and control groups. Participants received 2,000 IU/day 25 (OH) D<sub>3</sub> 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 (<italic>p</italic> = 0.001 and <italic>p</italic> = 0.001, respectively) after 8 weeks of HIIT. Insulin (<italic>p</italic> = 0.009, <italic>p</italic> = 0.001), weight, BMI and body fat percentage (<italic>p</italic> = 0.001, <italic>p</italic> = 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 (<italic>p</italic> = 0.025) and control groups (<italic>p</italic> = 0.007) and also in the HIIT + placebo group compared to the Vit D (<italic>p</italic> = 0.037) and control groups (<italic>p</italic> = 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.</p>