<qa>  What is the primary difference between the two maintenance programs?A randomized controlled clinical trial will examine the impact of two maintenance interventions designed to sustain weight lost in lifestyle treatment of obesity. The study sample will include 300 obese women, ages 50-75 years, from medically underserved rural areas in North Central Florida. All participants will receive a 6-month lifestyle intervention for weight loss called Phase 1 followed by randomization to one of three 12-month follow-up called Phase 2 programs: A a Face-to-Face Office-Based Maintenance Program, B a Telephone-Based Maintenance Program, or C an Education Comparison Condition. Participants will be stratified according to county and to BMI, and randomly assigned in groups of 11-12 to one of the two experimental programs or to the comparison condition. The experimental maintenance programs are designed to help participants sustain the eating and physical activity patterns needed to maintain lost weight. The primary difference between the two maintenance programs is their mode of delivery. One will be delivered via an office-based group counseling format; the other will be delivered via telephone counseling. The education comparison condition will involve a program of print materials on the maintenance of a healthy lifestyle delivered via biweekly newsletters. 