Textural analysis is a non-invasive objective method to characterize MRIs of subjects with muscular disorders. It has the potential to characterize muscle abnormalities that are not visible to the human eye. This allows the detection of muscle abnormalities earlier hence aiding early diagnosis and prognostication. This also allows textural analysis to be a potential quantitative outcome measure for clinical trials of drug treatments for muscular disorders. This study shows that the textural parameter entropy remains stable as age increases and can distinguish between diseased and normal muscle tissue.