The coaching staff is a group of non-athletes tied to a sports team. It is led by a head coach (known as a manager or senior coach in some sports), and consists of at least one assistant coach (usually two or more assistants), together with other members such as doctors, massage therapists, trainers, and equipment managers,fitness trainer, nutritionist, biomechanist, physiotherapist, etc.
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Coaching staff Wikipedia(Text) CC BY-SA