Which of the following factors is NOT known to slow immune function?

Regular physical activity is recognized for its role in enhancing immune function rather than hindering it. Engaging in consistent exercise has numerous health benefits, including improved circulation, increased blood flow, and enhanced circulation of immune cells throughout the body. These benefits can help the immune system function more effectively, making individuals more resilient to infections and diseases.

In contrast, factors like lack of exercise, excessive alcohol intake, and an improper diet are all known to negatively impact the immune system. Lack of exercise can lead to reduced immune efficiency due to decreased circulation and stimulation of the immune response. Excessive alcohol intake can suppress the immune system and increase susceptibility to infections. An improper diet lacking essential nutrients can also compromise immune function since the body requires certain vitamins and minerals to support immune health. Thus, while regular physical activity promotes a strong immune response, the other factors contribute to an overall decline in immune function.