Human beings are a delicate balance of mind, body, and spirit, so an imbalance in one domain affects all others. The purpose of this paper is to examine the effects that physical fitness may have on such human characteristics as personality and behavior. A review of the literature reveals that physical fitness is related to, and can affect, several personality characteristics, such as self-concept, depression, anxiety, attention span, and locus of control. Implications for counselors are explored, as well as ideas for implementing a more holistic approach to counseling that includes the physical domain. Guidelines are proposed for counselors who introduce physical activity and exercise into their clients' therapeutic process, and suggestions are made for further research. (Author/TE)