Active aging is a concept used to describe and promote lifestyles that contribute to a healthy aging process. However, these lifestyles vary widely, and the concept of active aging encompasses many activities. This paper considers two axes to classify the range of activities that can contribute to active aging: the resources needed to carry out such activities (low and high-resource needs) and the main orientation of the activities (self-oriented vs. activity with others). To illustrate this classification, three types of participation were analyzed, including in leisure activities, high-demand sports, and political organizations. The presented discussion compares these three activities, reveals challenges for future research using this new classification, highlights the practical implications of diversity when promoting forms of active aging.