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Exercise Training and Vitamin D Metabolism (Hybri-D)

U

University of Thessaly

Status

Enrolling

Conditions

Obesity & Overweight
Vitamin D

Treatments

Other: Control
Other: Exercise training

Study type

Interventional

Funder types

Other

Identifiers

NCT07300332
UTH_2612_8.10.2025

Details and patient eligibility

About

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.

Full description

Thirty adults with overweight/obesity (both males and females) who will meet the inclusion criteria will be randomly assigned to either an Exercise group (n=15) or a Control group (n=15). The Exercise group will participate in three hybrid-type high-intensity interval training sessions per week over a 12-week period, while receiving a balanced diet. The Control group will receive a balanced diet but will not participate in exercise training. Both groups will provide a resting blood sample and undergo assessment of their body composition (via bioelectrical impedance analysis), daily dietary intake (via dietary recalls) and physical activity level (via accelerometry) at baseline (prior to intervention), 6 weeks and 12 weeks.

Enrollment

30 estimated patients

Sex

All

Ages

35 to 50 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

  • BMI = 25-35 kg/m2
  • Absence of musculoskeletal injuries
  • Absence of chronic health-related complications
  • Non-smokers

Exclusion criteria

  • Consumption of Vitamin D supplements
  • Consumption of anti-inflammatory drugs, statins and/or steroids

Trial design

Primary purpose

Other

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

None (Open label)

30 participants in 2 patient groups

Exercise group
Experimental group
Description:
Exercise group will participate in three hybrid-type high-intensity interval training sessions per week over a 12-week period, while receiving a balanced diet
Treatment:
Other: Exercise training
Control group
Active Comparator group
Description:
Control group will receive a balanced diet but will not participate in exercise training
Treatment:
Other: Control

Trial contacts and locations

1

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Central trial contact

Dimitrios Draganidis, PhD; Ioannis G Fatouros, PhD

Data sourced from clinicaltrials.gov

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