Injecting new genes into aging muscles can restore youthful vigor and strength, according to a laboratory study of mice, researchers at the University of Pennsylvania Medical Center said today.
Past experiments have shown persuasively that exercise spurs the birth of new mitochondria in muscle cells and improves the vigor of the existing organelles.
One of the hallmarks of regular aerobic exercise is that in muscles, it increases the number and vigor of the mitochondria, the cellular structures that help to generate energy while consuming oxygen.
Replacing missing testosterone, he believes, will help restore youthful muscle tone, bone strength, potency, and general vigor.
The cancer-proof mice lost weight and muscle, developed hunched backs and brittle bones, and lost vigor.
Suddenly her straining muscles and racing heart were affirmations "of my sexual vigor, my sexual arousability".
Testosterone, which plays a central role in the development of the male sexual organs, as well as muscle and body hair, has long been a synonym for youthful vigor and virility.
Elderly mice exposed to these new treatments regrow their hair, gain muscle mass, see and hear better, and even regain their sexual vigor.
Alekseyev, 6 feet 1 inch and 350 pounds or so in his prime, with massive legs and chest and bulging arm muscles, dominated his sport when the Russians sought to project vigor in their cold war competition with the United States.
Yet as these giants grasp each other's bulging muscles, their bald heads rearing in the frame with tumescent vigor, it's easy to imagine that they'd like some alone time.
