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About
The purpose of this study is to determine whether testosterone replacement in older men with low testosterone levels will increase muscle strength, improve physical performance and overall sense of well being, and reduce fatigue.
Full description
The primary objective of this study is to determine whether testosterone replacement in older men, who have low testosterone levels and mild to moderate physical impairment, will increase their maximal voluntary muscle strength of major upper and lower extremity muscle groups. The second objective is to determine whether testosterone replacement will improve the power of knee extension, physical performance tests, the level of physical activity (measured by 3D accelerometer), self-reported disability, exercise tolerance and mobility. The third objective is to determine whether testosterone supplementation improves fatigue, affect, and overall sense of well being in older men with low testosterone levels. A fourth objective is to define the Minimum Clinically Important Differences in physical measures perceived by the participants (MCID).
Participant involvement will require 15-17 clinic visits over 28 weeks. Five to 7 of these visits are for physical testing, including body composition, muscle performance, and physical function. Throughout the study, hormone measurements will be obtained.
Enrollment
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Inclusion criteria
Exclusion criteria
Use of testosterone, anabolic steroids, dehydroepiandrosterone (DHEA), androstenedione or recombinant growth hormone (rGH) in the past year
Alcohol or drug abuse
Use of anti-convulsants or glucocorticoids (equivalent to prednisone > 20 mg/day)
Prostate cancer, breast cancer or other cancers with life expectancy < 5 years
Limiting neuromuscular, joint or bone disease, or history of stroke with residual neurological problems
Any neurological condition that would impact cognitive functioning including:
Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) Axis I psychiatric disorder in past year or use of psychotropic medications in 6 months
Abnormal prostate examination; PSA > 4 ng/mL; or BPH symptom score > 21
Unstable angina, New York (NY) class III or IV congestive heart failure or myocardial infarction within 3 months of entry
Abnormal laboratory values (at discretion of principal investigator)
Untreated thyroid disease; systolic blood pressure > 160 or diastolic > 100 mm Hg
Body mass index > 40 kg/m2
Untreated severe obstructive sleep apnea
Primary purpose
Allocation
Interventional model
Masking
209 participants in 2 patient groups, including a placebo group
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Data sourced from clinicaltrials.gov
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