1 The rate at which the unstable radioactive C-14 isotope decays into the stable non-radioactive N-14 isotope, 2  The ratio of C-12 to C-14 found in a given specimen,  And the ratio C-12 to C-14 found in the atmosphere at the time of the specimen's death.
Regaining muscle after atrophy should be done under the guidance of a physician and physical therapist to prevent any further injury, which may result in even greater atrophy. It is important that you consult with a physician to determine the exact reason for your muscle atrophy.ractice patience and start slowly. One of the biggest challenges that you may face while attempting to rebuild muscle is overcoming the realization that your body is not physically capable of the feats it used to be prior to atrophy. You will have to gradually work up to your fitness goals again.
Muscle atrophy can also happen if you are bedridden or unable to move certain body parts due to a medical condition. Astronauts, for example, can also experience some muscle atrophy after a few days of weightlessness. Other causes for muscle atrophy include: lack of physical activity for an extended period of time. aging.