Objective. To analyze the behavior of muscle strength (MS) of the upper and lower limbs more functional Post-Polio Syndrome (PPS) patients, through the analysis of data from two trials, check if there was variation of total MS limbs studied. Method. Retrospective data collection of patients with PPS at the Sector of Research in Neuromuscular Diseases (SIDNM) UNIFESP/EPM. We collected results of two test ratings of FM manual classified by Medical Research Council (MRC) of 12 muscle groups. At the end result, we applied the percentage calculation test MRC. Results. There was no reduction of MS assessed by MRC between 1st and 2nd assessment. Therefore, based on the total study sample, there was a decrease in MS knee flexors. As for MS upper limbs, it was found that there were decreases in MS total three groups of patients. Already in the lower limbs, the total MS remained stable in three groups. Conclusion. There was little variation in MS within the periods monitored. Hence, the complaint of new muscle weakness may be related to other factors, such as fatigue or aging.