The typical ages for men to reach their physical prime are 20-23 years old. This prime period continues until approximately 30-35 years old. Men generally reach their peak muscle mass and strength during their late 20s to early 30s.
While physical peak is often considered a primary aspect of "prime," other factors like experience, wisdom, and financial stability might contribute to a person's overall peak in different life stages. Men might experience their "prime" in their 30s or 40s in various aspects of life, such as careers or relationships.