Effects of a Smartphone-Supported Daily Walking Intervention on Psychological Well-Being and Body Composition in Adults With Cardiometabolic Disease

This study evaluated whether a three-month smartphone-supported daily walking intervention could improve physical activity, psychological well-being, and body composition in adults with cardiometabolic disease. Participants had cardiovascular disease and/or type 2 diabetes and used the Walk15 smartphone platform to monitor daily step count. The intervention aimed to increase daily walking by approximately 1,000 steps per day through individualized step goals, self-monitoring, and digital feedback. Outcomes were assessed before and after the intervention and included daily step count, body composition, handgrip strength, sleep duration, eating behaviors, subjective well-being, vigor, stress, anxiety, health, and happiness.

Inclusion Criteria: * Adults aged 20 to 65 years Physician-confirmed diagnosis of cardiovascular disease and/or type 2 diabetes mellitus verified through medical records Medical clearance from the treating physician confirming that participation in a walking-based physical activity program was safe and appropriate Ability to use the Walk15 smartphone platform or smartphone-connected wearable device for step-count monitoring Written informed consent provided before enrollment Exclusion Criteria: * Severe mobility limitations Acute medical conditions Psychiatric disorders requiring pharmacological treatment Inability to complete baseline or post-intervention assessments