Final answer:
The mentioned body fat percentages of 26% for males and 36% for females likely refer to an older adult demographic based on typical optimal fat content ranges and the way body fat distribution changes with age.
Step-by-step explanation:
The age group that typically has body fat standards of 26% for males and 36% for females is not specified by a singular age category, as body fat percentages can vary widely based on individual factors such as genetics, hormone levels, and overall health.
However, the question seems to be related to an assessment or a standard that might be referring to an older adult population, since these percentages are above what is considered optimal for younger adults, according to the information provided by LibreTexts, which suggests that the optimal fat content for females is between 20 and 30 percent and for males is between 12 and 20 percent. The skin-fold test is one method used to measure fat mass and assess body fatness.
Additionally, the provided texts make mention of how fat distribution and accumulation change as bodies age, and how gender-related differences exist in both levels of body fat and the location of fat deposition in the body. This indicates that aging can involve an increase in body fat percentage, which could make the mentioned standards more applicable to a more mature or aging demographic.