The aim of This study was to explore how psychological characteristics of participants in the health promotion camp training program were related to health behavior and program commitment. Subjects were 289 participants (88 males and 201 females) in the health promotion camp training program with an average of ages of 60.65 (SD=15.07) years. Psychological characteristics included in this study were variables from Theory of Planned Behavior, Big-5 personality, gratitude, optimistic bias, present bias, emotional stress traits, and coping. Results revealed that attitude toward health behavior, perceived behavioral control, gratitude, and active forgetting were determinants for practicing health behavior, whereas intention of health behavior, gratitude, active forgetting, and anger trait were determinants for program commitment. These findings suggest useful information for organizing or efficiently managing health promotion programs or planning further researches.