This study, titled "Changes in Sleep Quality and Body Composition Following a Multimodal Lifestyle Intervention in Older Women," aimed to investigate the impact of a multimodal lifestyle intervention. It primarily focused on changes in sleep quality and body composition. The study participants were older women dealing with obesity or overweight, defined as a BMI greater than 25. The intervention was classified as behavioral. The objective was to observe how such an intervention would affect the mentioned health parameters. The study was sponsored by Saglik Bilimleri Universitesi and has been successfully completed. It explored key health aspects in an older female population.