A fitness boot camp is a type of group physical training program conducted by gyms, personal trainers, and former military personnel. These programs are designed to build strength and fitness through a variety of types of exercise.
Boot camp training often commences with dynamic stretching and running, followed by a wide variety of interval training, including lifting weights/objects, pulling rubber TRX straps, pushups/situps, plyometrics, and various types of intense explosive routines. Sessions usually finish with yoga stretching. Many other exercises using weights and/or body weight, similar to CrossFit routines, are used to lose body fat, increase cardiovascular efficiency, increase strength, and help people get into a routine of regular exercise. Many programs offer nutrition advice as well. It is called "boot camp" because it trains groups of people and may be outdoors.