The Effects of Vitamin D Supplements on Sports Performance of Female Indoor Elite Athletes (NCT07748650) | Clinical Trial Compass
CompletedNot Applicable
The Effects of Vitamin D Supplements on Sports Performance of Female Indoor Elite Athletes
Taiwan37 participantsStarted 2021-07-22
Plain-language summary
This study is a randomized, double-blind study evaluated the effects of 90 days of vitamin D supplementation, with or without calcium, on bone mineral density and sports performance in indoor female semiprofessional athletes.
Who can participate
Age range
20 Years
Sex
FEMALE
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Athletes in Taiwan's top corporate league or semi-professional league that has been training and competing indoors for a long time.
Exclusion Criteria:
* Under 20 years old
* Pregnant
* Being in vulnerable groups such as prisoners or mentally handicapped, disabled, etc.
* Had skeletal muscle-related injuries or surgeris
* Have kidney and/or liver disease, lipid malabsorption of calcium and vitamin
* Having organ stones
* Have taken supplments and/or calcium and/or vitamin D and/or other related health foods within two weeks
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
isokinetic muscle strength Biodex
Timeframe: From enrollment to the end post-test at 90 days.
2
Star excursion balance test
Timeframe: From enrollment to the end post-test at 90 days.
3
Vertical jump test
Timeframe: From enrollment to the end post-test at 90 days.
4
T-shape agility test
Timeframe: From the entrollment to post-test at 90 days.