Supplementary Intake of Vitamin D During 12 Weeks Strength Training in Younger and Older People

The Importance of Supplementary Intake of Vitamin D on the Efficacy of 12 Weeks of Strength Training in Both Vitamin D Sufficient Younger and Older People

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01252381

Enrollment

Registered

2010-12-03

Start date

2010-11-30

Completion date

2013-01-31

Last updated

2017-07-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Muscle CSA, Muscle Strength, Tendon CSA, Tendon Elasticity, VDR Receptor

Brief summary

The aim is to investigate the importance of vitamin D levels to achieve the effect of strength training. If we can show that vitamin D has an effect of training, the ultimate goal is to find out why and how vitamin D affects muscle. This would potentially have important implications for public health. Since a large number of populations, including elderly, are shown to have too little vitamin D and also has low muscle strength, it will be essential that these people added vitamin D in relation to training and rehabilitation.

Interventions

OTHER12 weeks Strength exercise training

Training 3 times a week, leg extensions and leg press

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

OTHER

Masking

DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender

MALE

Age

20 Years to 75 Years

Healthy volunteers

Yes

Inclusion criteria

* Men 20-30 or 60-75 years old

Exclusion criteria

* smokers Knee problems On medication affecting protein synthesis High exposure to sun light (ex. ski holiday) during the trial

Design outcomes

Primary

Measure	Time frame
Cross-sectional area of thigh musculature and knee tendon	12 weeks
VDR potential target CYP27b1	12 weeks

Countries

Denmark

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 15, 2026