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.
Photo Credit Purestock/Purestock/Getty Images. Muscle atrophy is the loss of size or mass of muscle tissue and can afflict any muscle in the body. Atrophy of the muscle can occur for a number of reasons, including disuse from an injury such as if your arm is in a cast or you are bedridden.Simple lack of activity and the natural aging process can also cause muscles to atrophy.tep 3. Use light resistance such as small hand weights or resistance tubing to begin rebuilding your lost muscle mass. Resistance needs to be added gradually, adding too much too quickly can result in injury. A leg extension with a resistance band is an example exercise for atrophied quadriceps muscles.