Exercise Mode and Acute Bone Resorption
Public ClinicalTrials.gov record NCT04815824. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Comparison of Exercise Mode on Disruptions in Calcium Homeostasis
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Endurance exercise is often recommended to improve cardiometabolic health and maintain bone health throughout life and to prevent osteoporotic fracture. However, there is evidence to suggest that bone does not always adapt in the way that is expected, and that endurance exercise may lead to bone loss under certain conditions. Disruptions in calcium homeostasis during exercise may explain this observation, and preliminary data suggests that the mode of exercise (i.e., cycling versus treadmill) may result in different magnitudes of change in bone biomarkers. The purpose of this study is to determine if mode of exercise results in a differential bone biomarker response to an acute exercise bout in older Veterans. Blood samples will be collected before, during, and after 2 acute exercise bouts: 1) brisk treadmill walking; and 2) vigorous stationary cycling. Bouts will be matched for relative intensity and duration. This data will be used to develop future exercise interventions in older Veterans aimed at preserving both cardiometabolic and bone health.
Study identification
- NCT ID
- NCT04815824
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 9 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 60 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 7, 2021
- Primary completion
- Jun 29, 2024
- Completion
- Sep 29, 2024
- Last update posted
- Jul 19, 2025
2021 – 2024
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Rocky Mountain Regional VA Medical Center, Aurora, CO | Aurora | Colorado | 80045-7211 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04815824, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 19, 2025 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04815824 live on ClinicalTrials.gov.