The effect of an on-site health promotion program on lifestyle behavior, health, attitude, and stress was studied with 41 university faculty and nonacademic administrators. The participants were administered a maximal graded exercise tolerance test, hydrostatic weighing, and the Lifestyle Analysis Questionnaire. While 32 staff were assigned to an intervention group (I) that attended a wellness program 3 times per week for 12 weeks, 9 staff constituted the control group (C) and followed their regular exercise schedule. The wellness intervention consisted of an aerobic exercise class, lifestyle educational literature, and progressive muscle relaxation. After the 12 weeks, the I and C groups completed a retrospective Lifestyle Activity Patterns Questionnaire in addition to the pretests. While no changes were observed for the C group, lifestyle behaviors improved for the I group, including significant differences for body cathexis, symptoms, and job satisfaction. Between-group differences were observed for tolerance to overload, self-esteem, and symptoms. The positive moderator and strain changes that occurred as a result of the intervention have effects on employee quality of life, and costs related to premature morbidity and mortality. (Author/SW)