This paper begins by defining the terms "weight training,""weight lifting,""strength,""power," and "muscular endurance.""Weight training" is differentiated from "weight lifting" and defined as a systematic series of resistance exercises designed to promote physical development and conditioning or to rehabilitate persons who have suffered injury or illness. General principles of weight training are listed. The remainder of the paper is divided into the following sections: (a) a weight circuit for strength development--a description of a training program designed to accommodate a large number of students working simultaneously within a short time during the physical education instructional period; (b) a power training circuit; (c) description of weight training exercises; and (d) a description of calisthenic exercises. (JA)