To conduct a systemic assessment of the effectiveness of the InShape program to improve fitness, promote health, and reduce the risk factors associated with excess disability and premature mortality in persons with SMI by a) refining and manualizing the IN SHAPE program, b) quantifying pre-post differences in physical activity, physical fitness, health status, affect, quality of life, and satisfaction with the IN SHAPE program, and c) by exploring age-associated modifications in the intervention necessary to address the needs of older and younger persons.