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Bone Metabolism BiomarkersPhase 2NCT01419730

Vitamin D and Physical Activity on Bone Health

A Phase 2 study testing Vitamin D3 and Physical Activity in people with Bone Metabolism Biomarkers and Bone Mineral Density, run by University of Rochester at 1 site in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

This research will examine the effectiveness of vitamin D or placebo (the placebo is a tablet that looks like Vitamin D study drug, but has no Vitamin D study drug in it), with and without physical activity (walking and progressive resistance exercise), in treating bone loss in women who have undergone treatment for… Read more about this study

Who is it for?
Ages 18 to 99 years, women only
What is being tested?
Vitamin D3 and Physical Activity
Could I receive a placebo?
No, everyone receives an active treatment
How many people
191 participants
Where
1 siteUnited States
Study dates
Aug 2011to 30 Dec 2026
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 99 years
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Must be female and have a primary diagnosis of Stage I, II, or III hormone-receptor positive breast cancer.
  • Women must be postmenopausal at time of enrollment.
  • Must provide informed consent.
  • Must be willing to discontinue use of calcium and/or vitamin D supplements.
  • Participants must have an ionized serum calcium level within normal limits (1.19-1.29mmol/L) and a total corrected serum calcium of < 10.6 mg/dl.
  • Participants must be slightly vitamin D deficient (serum vitamin D level <32ng/ml)
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  • Must have a functional capacity rating of ≤ 2 on the Eastern Cooperative Oncology Group (ECOG) performance status when assessed at baseline.132
  • Must have the approval of their treating physician (or physician's nurse practitioner or physician's assistant) to participate in sub-maximal physiological fitness testing and a low to moderate home-based walking and progressive resistance exercise program and to receive the 24-week supplementation of vitamin D.
  • Must be less than five years from the diagnosis of breast cancer and must be within 12 months of starting treatment with aromatase inhibitors (AI) in accordance with American Society of Clinical Oncology (ASCO) guidelines.

Who cannot join

  • Subjects with life-threatening conditions that would preclude them from breast cancer treatment including chronic cardiac failure, which is unstable despite medication use, uncontrolled hypertension, uncontrolled diabetes mellitus, or unstable coronary artery disease.
  • Patients who had a myocardial infarction within the past year.
  • Patients with severe metabolic disorders, which includes phenylketonuria (PKU), homocystinuria, and Fabry's disease, that would preclude them from taking calcitriol.
  • Patients with impaired renal function (CRCL < 60 mL/min) or who had kidney stones (calcium salt) within the past 5 years.
  • Patients with hypercalcemia (corrected serum Ca ≥ 10.6 mg/dl) or a history of hypercalcemia or vitamin D toxicity.
  • Patients currently taking calcium supplements or aluminum-based antacids must be willing to discontinue their use if they are to enroll in the study.
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  • Patients currently taking vitamin D supplements must immediately discontinue their use if they are to enroll in the study.
  • Patients with a known sensitivity to vitamin D.
  • Patients who are severely vitamin D deficient (<10 ng/ml).
  • Women on antiresorptive drugs (e.g. bisphosphonates) within the past year.
  • Patients not capable of participating in an exercise intervention due to severe knee arthrosis or ligament/cartilage injuries of the lower extremities.
  • Women with malabsorptive syndromes (i.e. cystic fibrosis, chronic pancreatitis) or taking medications that decrease the absorption of fat soluble vitamins (i.e. Orlistat, Questran).

Trial locations and contacts

1 site in 1 country.

United States1 site
  • University of Rochester

    Rochester, New York, 14642

Other trials in United States

About this study

Official title: The Effect of High-Dose Vitamin D and Physical Activity on Bone Health in Breast Cancer Patients Receiving Hormonal Therapy

This research will examine the effectiveness of vitamin D or placebo (the placebo is a tablet that looks like Vitamin D study drug, but has no Vitamin D study drug in it), with and without physical activity (walking and progressive resistance exercise), in treating bone loss in women who have undergone treatment for breast cancer. The investigators would also like to find out if the physical activity program improves cardiovascular fitness, energy expenditure, muscular strength, muscle mass, and balance. One hundred five (105) subjects are expected to take part in this study. The investigators don't know if bone loss in breast cancer survivors should be treated differently than bone loss in other women.

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Vitamin D3Drug

    Vitamin D3 50,000 IU

  • Physical ActivityBehavioural

    Progressive walking and resistance band exercise prescription for a period of 24 weeks

Study groups in NCT01419730
Study groupRoleWhat they receive
Vitamin D3 50,000 IUActive comparatorVitamin D3 50,000 IU: Patients will be assigned to receive a daily multivitamin, calcium supplement and 50,000 IU/week of vitamin D for a period of 24 weeks.
Receives: Drug: Vitamin D3
Vitamin D3 50,000 IU and Physical ActivityActive comparatorVitamin D3 50,000 IU and Physical Activity: Patients will be assigned to receive a daily multivitamin, calcium supplement, 50,000 IU/week of vitamin D, and a progressive walking and resistance band exercise prescription for a period of 24 weeks.
Receives: Drug: Vitamin D3; Behavioral: Physical Activity
ControlNo interventionPatients will be assigned to receive a daily multivitamin, calcium supplement, vitamin D placebo, and standard care monitoring.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Measure the Amount of Bone Mineral Density Loss in Non-metastatic Breast Cancer Patients Receiving a High Dose Vitamin D Therapy Along With a Structured Home-based Walking and Progressive Resistance Exercise Program.

    To collect preliminary data on the effects of vitamin D therapy and exercise (alone or in combination) on bone mineral density (BMD) as measured by a dual energy X-ray absorptiometry (DXA) in non-metastatic breast cancer patients who began hormonal therapy within the previous 12 months. Amount of bone loss was measured with change in BMD.

    Measured: 24 weeks

Secondary outcomes (3)
  1. Measure the Effect of Vitamin D and Muscle Strength in Non-metastatic Breast Cancer Patients

    Measuring physical fitness for muscle strength using handgrip dynamometer in non-metastatic breast cancer patients who begin hormonal therapy within the previous 12 months.

    Measured: 24 weeks

  2. Measure the Effect of Vitamin D and Aerobic Capacity in Non-metastatic Breast Cancer Patients

    Pedometer for number of steps for aerobic capacity.

    Measured: 24 Weeks

  3. Measure the Effect of Vitamin D and Balance in Non-metastatic Breast Cancer Patients

    Testing Force Plate Area95 Eyes Closed Open Base for measure of balance

    Measured: 24 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 Aug 2011 (estimated)
  2. Study startAug 2011
  3. Primary completion30 Dec 2024
  4. Study completion30 Dec 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Factorial
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
191 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01419730
Sponsor's protocol ID
34834
Status last verified
Jul 2026
First submitted
11 Aug 2011
Last updated
5 Aug 2026
Data monitoring committee
Yes

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Vitamin D3 and Physical Activity in people with Bone Metabolism Biomarkers and Bone Mineral Density, run by University of Rochester at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 9 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 5 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 5 Aug 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Measure the Amount of Bone Mineral Density Loss in Non-metastatic Breast Cancer Patients Receiving a High Dose Vitamin D Therapy Along With a Structured Home-based Walking and Progressive Resistance Exercise Program. (time frame: 24 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Aug 2026.

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