Introduction
The physiological demands of soccer are complex. This
complexity is partly a consequence of the nature of the exercise
pattern. The requirement for frequent changes in both the speed
ofmovement (e.g., walking, jogging, high intensity running, and
sprinting) and direction, makes the activity profile intermittent.
The intermittent exercise associated with soccer necessitates
contributions from both the aerobic and the anaerobic energy
systems. Training programmes for players will therefore need to
include activities and exercise prescriptions that stress these
systems. Players also need to possess muscles that are both
strong and flexible. These attributes are important for the successful
completion of the technical actions (e.g., passing,
shooting, etc.) which ultimately determine the outcome of the
match