Exercise Training and Vitamin D Metabolism

Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age35-50
SponsorUniversity of Thessaly

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 volunteers

Qualifiers

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

Design model

Parallel

Treatments tested in this trial

  • Exercise training

    Other intervention

    Receive a balanced diet and participate in three hybrid-type high-intensity interval training sessions per week over a 12-week period

  • Control

    Other intervention

    Receive a balanced diet but abstain from any type of exercise training

Treatment groups

30 Participants
are divided into 2 treatment groups
Group A: Exercise groupExperimental treatment 1 intervention
Group B: Control groupActive comparator 1 intervention

Trial outcomes

Primary outcomes

1

Change in 25-hydroxyvitamin D concentration

25-OH-VD will be quantitatively determined in serum

Time frame
At baseline, 6 weeks and 12 weeks
2

Change in plasma Vitamin D binding protein concentration

Vitamin D binding protein concentration will be determined in plasma

Time frame
At baseline, 6 weeks and 12 weeks
3

Change in calcium concentration

Calcium concentration will be determined in serum

Time frame
At baseline, 6 weeks and 12 weeks
4

Change in albumin concentration

Albumin concentration will be determined in serum

Time frame
At baseline, 6 weeks and 12 weeks

Secondary outcomes

1

Change in reduced glutathione concentration

Reduced glutathione concentration will be determined in blood erythrocytes

Time frame
At baseline, 6 weeks and 12 weeks
2

Change in oxidized glutathione concentration

Oxidized glutathione concentration will be determined in blood erythrocytes

Time frame
At baseline, 6 weeks and 12 weeks
3

Change in dietary intake

Dietary intake habits will be assessed through dietary recalls

Time frame
At baseline, 6 weeks and 12 weeks
4

Change in physical activity level

Physical activity will be assessed via accelerometry

Time frame
At baseline, 6 weeks and 12 weeks

Other outcomes

Sponsors and contacts

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