This study aimed to analyze the relationship between obesity, sarcopenia, sarcopenic obesity, and dynapenia in subjects from 65 to 90 yr old in a geriatric center. A population of 45 subjects between 65 and 90 yr was used in this investigation. Body composition was measured through a bioelectrical impedance instrument using data from the NHANES III study of elderly men and women (>60 yr) to identify sarcopenia and the following cutoff points to identify dynapenia (men, <26 kg; women, <16 kg) with manual dynamometer. The statistic used consisted of chi-square for the analysis of two categorical variables. Student's t-test was used for the analysis of one categorical variable and one continuous variable and the descriptive analysis that included frequencies, proportions, mean, and SD. The relationship between sex with obesity, sarcopenia, and sarcopenic obesity showed a significant relationship, with greater significance in obesity with P = 0.003. In women, the highest percentage was found in the results of dynapenia (56%) and obesity (44%), whereas in men, the highest results were found in dynapenia (50%), sarcopenia (50%), and sarcopenic obesity (55%). Dynapenia is found on a larger scale in both sexes compared with obesity, sarcopenia, and sarcopenic obesity.