About this trial
The prevalence of Vitamin D deficiency is significantly higher in adults with overweight/obesity compared to those with normal body mass index (BMI). The "entrapment" of Vitamin D in adipose tissue due to impaired lipolytic stimulation and/or adipose tissue dysfunction has been proposed as the driving mechanism. Exercise training has been proposed as a promising strategy to increase mobilization of Vitamin D from adipose tissue, given its well described role in stimulating lipolysis. Indeed, a recent study revealed that participation in moderate-intensity cardiovascular type exercise over winter can mitigate the decline in 25-hydroxyvitamin D \[25(OH)D\] in adults with overweight/obesity, independent of weight loss. The aim of this study is to investigate the impact of hybrid-type high-intensity interval training over winter on vitamin D metabolism, in adults with overweight/obesity.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
BMI = 25-35 kg/m2
Absence of musculoskeletal injuries
Absence of chronic health-related complications
Non-smokers
Disqualifiers
Consumption of Vitamin D supplements
Consumption of anti-inflammatory drugs, statins and/or steroids
Trial design
Parallel
Treatments tested in this trial
Exercise training
Other interventionReceive a balanced diet and participate in three hybrid-type high-intensity interval training sessions per week over a 12-week period
Control
Other interventionReceive a balanced diet but abstain from any type of exercise training
Treatment groups
Trial outcomes
Primary outcomes
Change in 25-hydroxyvitamin D concentration
25-OH-VD will be quantitatively determined in serum
Change in plasma Vitamin D binding protein concentration
Vitamin D binding protein concentration will be determined in plasma
Change in calcium concentration
Calcium concentration will be determined in serum
Change in albumin concentration
Albumin concentration will be determined in serum
Secondary outcomes
Change in reduced glutathione concentration
Reduced glutathione concentration will be determined in blood erythrocytes
Change in oxidized glutathione concentration
Oxidized glutathione concentration will be determined in blood erythrocytes
Change in dietary intake
Dietary intake habits will be assessed through dietary recalls
Change in physical activity level
Physical activity will be assessed via accelerometry
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