Historically, traditional pre-lesson warm-ups in physical education have consisted of callisthenic exercises such as jumping jacks, pushups, sit-ups, and running laps, as well as static stretching activities. These warm-ups are used to increase core body temperature and to assist blood flow to the working muscles. Although the traditional warm-up is commonly used, there are some problems that have been identified with this practice. Results from a study provide evidence that warm-ups consisting of aerobic exercise and static stretching may be less than optimal for preparing students for moderate to vigorous physical activity. In light of this information, this article will explore different approaches to pre-lesson warm-up activities that are beneficial in warming the body for exercise as well as being meaningful to students in a manner that encourages them to maximize their activity expenditures during pre-lesson warm-ups.