The Marriage Checkup is designed to help couples assess the strengths and weaknesses of their relationship and to develop strategies for strengthening its health. Like physical health, the health of a relationship can be developed to greater levels of fitness and resilience to illness. Thus, even healthy couples can benefit from a marital health perspective by developing exercises for optimizing their health and fitness. This book primarily serves couples interested in improving the health of their relationship. Counselors and therapists may recommend that their couples-patients use the book. Additionally, the book may be of interest to professors of marriage and family counseling.