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Research conducted at the University of Alberta and reported in the Circulation Heart Failure, found that patients with heart failure that were given testosterone supplements could discover their breathing improve and that can participate more in exercise. The report actually covered four different studies on patients who were suffering with chronic heart failure on a moderate to severe level.
Therapy using testosterone also causes the patients to have added skeletal endurance quite quickly on top of added muscle mass. This kept up for about 1 year. Justin A. Ezekowitz, M.D., M.Sc., the author of the report stated, "The improvement in exercise capacity was consistent across all of the studies. Compared to patients in placebo groups, the differences were striking."
Larger studies need to be performed for confirmation of these facts, before therapy with testosterone supplement should be used for heart failure patients according to the researchers. Therapy like this focuses on the skeletal muscle instead of the heart muscle.
Ezekowitz stated, "We don't want patients and their loved ones rushing to buy testosterone supplements online, or physicians to misinterpret the findings. First the results need to be corroborated in large clinical trials."