Objective: Since the rate of depression and Vitamin D deficiency has been reported in Iranian obese women, it needs to be considered seriously by researchers. Therefore, the aim of this research was to investigate the effect of vitamin D supplement (VD) and indoor physical activity (IPA) vs outdoor physical activity (OPA) on the depression of obese depressed women.
Methods:This was a prospective study with 75 women (mean age: 43.5 ± 12.8 years, with body mass index (BMI) ranging from 30.0 to 35.0 kg/m 2 ). They were randomly assigned into four experimental groups who either did indoor or outdoor physical activity with or without Vitamin D. Depressive symptoms were assessed with the Beck depression inventory. The intervention group (indoor and outdoor physical activity with vitamin D) was administered a 2,000 IU Vitamin D per day for 12 weeks. The training program included warming-up, main protocol (treadmill versus outdoor jogging) and cooling-down four times a week for 3 months.Results: The results indicated that the level of depression in OPA + VD group was improved from severe (33.26 ± 2.12) to mild (16.73 ± 1.38) suggesting 50% improvement in depression score (P = 0.001) and there was, also, a significant improvement in the depression level of IPA+VD, OPA, and IPA groups from sever to moderate level in depression scores (P = 0.001).Conclusions: Both vitamin D and exercise (especially outdoor) have positive effects on depressive symptoms of depressed obese women. As a result, promotion of an active outdoor lifestyle and having sufficient Vitamin can counteract vitamin D deficiency and the rate of depression in this vulnerable population.Keywords: Vitamin D, Indoor, Outdoor, Depression
BackgroundTodays, obesity and depression are two major public health problems. It has been reported that depression prevalence is more in obese people compared to those who are not obese up to 25 percent. On the other hand, there is a link between obesity with depression and lower levels of serum 25-hydroxyvitamin D. The prevalence of vitamin D deficiency (1), depression (2), and obesity (3) has increased rapidly in Iran during the past decade (4). Recently, the positive effect of vitamin D on the prevention and the treatment of mental health problems such as depression has been well documented (4). Divergent results have been reported concerning the relationship between Vitamin D and depression in such a manner that some cross sectional studies have found a relationship between low levels of serum 25-hydroxyvitamin D and depressive symptoms (5, 6); whereas other studies of similar design have found no such relationship (7). A study conducted in Saudi Arabia showed that deficient levels of Vitamin D were found in women which made them vulnerable to serious health problems, in spite of living in one of the sunniest countries in the world (8). Furthermore, in a study undertaken in Jordan, 83.3% of women wearing the most covering style of Islamic dresses were found to be deficient in summer time. This is rather striking whe...