The document discusses various methods of exercise for maintaining an active and healthy lifestyle. It describes circuit training as a series of exercises that work different muscle groups without allowing two muscle groups to be worked consecutively. Aerobics, aqua aerobics, yoga, continuous training, and Pilates are also mentioned as methods. Core stability training, like planks and side planks, works the back, abdominal, and pelvic muscles and is important for all sports. The document concludes with reviewing multiple choice questions about these exercise methods.