comparison of the effect of two different types of hiit on serum homocysteine and 25-hydroxyvitamin d levels in overweight women with low vitamin d status

Vitamin d deficiency along with obesity, which is a significant health problem, can increase the risk of many diseases. regular exercise has a favorable effect on this problem, but some people spend little or no time to benefit from these favorable effects. in this study, the effect of two different types of high intensity interval training on serum homocysteine and 25-hydroxyvitamin d levels in overweight women with low vitamin d levels was compared. this semi-experimental study was conducted on 39 overweight women with vitamin d deficiency. subjects were randomly divided into control groups, high intensity interval resistance training, and high intensity interval running training after being selected using the available sampling method. interval training were performed during 8 weeks and 3 sessions per week. high intensity interval resistance training was performed in three sets with an intensity of 80% of a maximum repetition and a 2.5minute rest between sets. high intensity interval running training was performed with the 12 x 1-min running bouts at 80-90% hrmax interspersed with 1-min active recovery at 50% hrmax. data were analyzed using one-way anova tests (kruskal-wallis for non-normal data) and paired t at a significance level of less than p<0.05. after 8 weeks, the level of homocysteine in the experimental groups decreased and the level of 25-hydroxyvitamin d increased significantly (p<0.05). in addition, there was no significant difference between the effect of two types of intermittent exercise on reducing homocysteine or increasing 25-hydroxyvitamin d (p<0.05). it seems that both types of intense interval training (repetitive running and resistance) can have similar protective effects in obese women with vitamin d deficiency, by reducing homocysteine, improving vitamin d status, and reducing body weight.