Radius Loading in Primary Hyperparathyroidism

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2010-02-28

Study Completion Date

2014-10-31

Brief Summary

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The purpose of the study is to determine the effect of forearm exercise on forearm bone density in post-menopausal women with or without primary hyperparathyroidism.

The investigators hypothesize that forearm exercise will increase forearm bone density in patients with primary hyperparathyroidism more so than in patients without primary hyperparathyroidism.

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Detailed Description

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Primary hyperparathyroidism (PHPT), a disease characterized by excess parathyroid hormone (PTH) and high blood calcium, is one of the most common endocrine disorders.

PHPT is seen most often in post-menopausal women. Kidney stones and bone deformities were prominent manifestations of the disease in the past, however, PHPT is now primarily asymptomatic due to incidental detection of high blood calcium levels.

Many patients with PHPT, however, have low bone mineral density (BMD) when bone mass is measured by dual energy x-ray absorptiometry (DXA), primarily at the forearm.

There is no effective medical therapy which increases bone density at the forearm in patients with PHPT. PTH both builds and breaks down bone, and the pathways by which PTH mediates these actions are beginning to be identified. Prior research suggests that mechanical loading shifts PTH towards building bone. Arm exercise is an attractive option for the treatment of low forearm BMD in patients with PHPT since it is often the site most affected by excess PTH.

Conditions

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Primary Hyperparathyroidism Bone Diseases, Metabolic Osteoporosis, Postmenopausal Bone Loss, Postmenopausal

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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PHPT/ Walking + Forearm exercise

Ten participants with PHPT will be randomized to the intervention of 52 weeks of the forearm exercise program plus walking.

Group Type EXPERIMENTAL

Forearm exercise program

Intervention Type OTHER

Participants assigned to forearm exercise will receive training in forearm strengthening exercises from a doctoral occupational therapy student. Participants will be taught 8 exercises and are performed at home. The exercise program is designed to take about 30 minutes per session.

PHPT/ Walking alone

Ten participants with PHPT will be randomized to the intervention of 52 weeks of the walking program alone. Walking will consist of 30 minutes at a moderate pace every other day for 52 weeks.

Group Type PLACEBO_COMPARATOR

Walking program

Intervention Type OTHER

Walking will consist of 30 minutes at a moderate pace every other day for 52 weeks. The walking program for all participants constitutes the control/placebo comparator.

Osteopenia/ Walking + Forearm exercise

Ten healthy, postmenopausal women with osteopenia will be randomized to the intervention of 52 weeks of the forearm exercise program plus walking.

Group Type ACTIVE_COMPARATOR

Forearm exercise program

Intervention Type OTHER

Participants assigned to forearm exercise will receive training in forearm strengthening exercises from a doctoral occupational therapy student. Participants will be taught 8 exercises and are performed at home. The exercise program is designed to take about 30 minutes per session.

Osteopenia/ Walking alone

Ten healthy, postmenopausal women with osteopenia will be randomized to the intervention of 52 weeks of the walking program alone. Walking will consist of 30 minutes at a moderate pace every other day for 52 weeks.

Group Type PLACEBO_COMPARATOR

Walking program

Intervention Type OTHER

Walking will consist of 30 minutes at a moderate pace every other day for 52 weeks. The walking program for all participants constitutes the control/placebo comparator.

Interventions

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Forearm exercise program

Participants assigned to forearm exercise will receive training in forearm strengthening exercises from a doctoral occupational therapy student. Participants will be taught 8 exercises and are performed at home. The exercise program is designed to take about 30 minutes per session.

Intervention Type OTHER

Walking program

Walking will consist of 30 minutes at a moderate pace every other day for 52 weeks. The walking program for all participants constitutes the control/placebo comparator.

Intervention Type OTHER

Other Intervention Names

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Mechanical Loading Walking

Eligibility Criteria

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Inclusion Criteria

1. Primary hyperparathyroidism (defined by an elevated serum calcium and concomitantly elevated or inappropriately normal PTH)
2. Female sex, postmenopausal status for at least five years, ages 45-80
3. English- or Spanish-speaking
4. DXA T-score less than -1.0 at the one-third radius
5. Physically capable of exercise
6. 25-hydroxyvitamin D \>20 ng/mL. The latter inclusion criterion will lead to the enrollment of some individuals whose vitamin D stores will not be frankly low. We feel, however, that it is better to study subjects in their usual state rather than replacing them with vitamin D which could add another variable that would further complicate this pilot study.

1. Female sex, postmenopausal status for at least five years ages 45-80
2. English- or Spanish-speaking
3. DXA T-score less than -1.0 at the one-third radius
4. Physically capable of exercise
5. Normal serum calcium and PTH level
6. 25-hydroxyvitamin D \>20 ng/mL

Exclusion Criteria

1. Men, premenopausal women, women less than age 45 or greater than age 80
2. Familial hypocalciuric hypercalcemia
3. Current or prior use of bisphosphonates (alendronate or risedronate (within 12 months), ibandronate (within 6 months), other bisphosphonate (2 years)
4. Current use of cinacalcet
5. Current or prior use of estrogen replacement therapy (within 2 years)
6. Planned parathyroidectomy (within one year)
7. Planned initiation of bisphosphonates
8. DXA T-score greater than -1.0 at the one-third radius
9. Cardiovascular disease or uncontrolled hypertension
10. Exercise-limiting pulmonary diseases
11. Malignancy other than non-melanomatous skin cancer or microscopic thyroid cancer (within 5 years)
12. Renal failure
13. Secondary hyperparathyroidism
14. Celiac disease
15. Physical/orthopedic disabilities and neurologic disorders or vasculopathies that would place the subjects at risk or limit their ability to perform exercise (eg. arthritis, carpal tunnel syndrome, rotator cuff injury, etc)
16. Moderate or high physical activity (category 2 or 3) as assessed by the IPAQ questionnaire. This latter exclusion criterion is a measure of baseline physical activity and looks to exclude those who would have a lower likelihood of benefit by baseline participation in an exercise program.
17. Protected individuals (institutionalized), prisoners, and any other prospective participant who might not be able to give voluntary informed consent.

Minimum Eligible Age

45 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

Yes