Strenuous or intense exercise has severe and continual influences on a person’s systemic immunity. When athletes and non-athletes are resting, their respective systems are more alike than dissimilar except the activities of the NK cell which have a tendency to be elevated in the athletes. Many constituents of the immune system display adverse changes after long-drawn-out heavy exertion. These changes occur in several sections of the immune system and the body (like the skin, lungs, blood, muscles and the mucosal tissues of the upper respiratory tract). Although it is still subject to interpretation, most exercise immunologists are of the opinion that it is during the said “open window” of impaired immunity (whereby the duration may vary from 3 to 72 hours, contingent on the immune measure) during which viruses and bacteria may possibly gain a foothold, thereby resulting in a higher risk of subclinical and clinical infection. The risk of infection can become greater than before when the other immune-related factors are present, such as being exposed to novel pathogens when travelling, not having enough sleep, undergoing severe mental stress, suffering from weight loss or malnourished

Objective: Senescence represents a public health disaster, which the nutritional profile is the main key to determine the status of seniors. The objective is the evaluation of the nutritional status and the body composition of the Moroccan elderly people of Casablanca. Materials and Methods: This is a cross-sectional survey of 62 people aged over 60 years, consulates in ambulatory medicine in a public Moroccan hospital, from January to April 2015, in Casablanca we used questionnaire to determine sociodemographic characteristics and the anthropometric indicators. Results: The 62 subjects in the study reported a sex ratio of 0.5 and an average age of 71.08, Significant male and female varieties were recorded for lean and fat mass measurements. Negatively significant correlations were found between BMI and total cell water. The model of the multiple descending linear regression showed that fat mass is a factor associated with total body water (beta = -0.1, p = 0.05) in the elderly of our study. Conclusion: we found that the nutritional status and the body composition of the elderly consultants in outpatient medicine were associated.