CompletedNot Applicable

Muscle Mass During Space Exploration

United States40 participantsStarted 2009-08

Plain-language summary

The investigators will test the following hypotheses: 1. Bedrest will blunt the anabolic response to a mixed nutrient meal, facilitating a loss of muscle mass and functional capacity that is only partially restored during rehabilitation. 2. Enriching daily meals with leucine will promote protein synthesis and maintain the anabolic response to mixed nutrient meal ingestion. This will preserve lean muscle mass and function during bedrest and facilitate the recovery of functional and metabolic capacity during rehabilitation.

Who can participate

Age range

45 Years – 60 Years

Sex

ALL

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

. Age between 45-60
. Ability to sign informed consent

Exclusion criteria

. Subjects with cardiac abnormalities considered exclusionary by the study physicians
. Subjects with uncontrolled metabolic disease
. A GFR \<65 mL/min/1.73m2 or evidence of kidney disease or failure
. Subjects with vascular disease or risk factors of peripheral atherosclerosis
. Any history of hypo- or hyper-coagulation disorders. (e.g., Coumadin use or history of DVT or PE)

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

Lean Leg Mass

Timeframe: At baseline prior to beginning bed rest and after 14 days of bed rest

Trial details

NCT IDNCT00968344

SponsorThe University of Texas Medical Branch, Galveston

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2015-04

Results submitted2017-12-01

View on ClinicalTrials.gov More Muscle Loss trials