Management of physical activity using a wearable device during intensive decongestive therapy in patient with lower limb lymphedema: a case report.

[Purpose] Lymphedema is a chronic, progressive disorder impairing function and quality of life. Although complete decongestive therapy (CDT) is standard, optimal regulation of physical activity during CDT is unclear. This case report evaluated the feasibility of wearable device use during intensive CDT. [Participant and Methods] A 78-year-old woman with bilateral lower limb lymphedema after cervical cancer surgery and radiotherapy underwent a 2-week inpatient CDT program. Assessments included limb circumference, Timed Up and Go test (TUG), skin mechanical properties (Cutometer®), body water distribution (ECW/TBW ratio), and quality of life (LYMQOL-Leg). A Fitbit® device continuously monitored steps, distance, energy expenditure, and sleep. A 7,000-step daily goal was collaboratively set. [Results] After CDT, limb circumference and ECW/TBW ratio decreased, with improvements in skin parameters and mobility (shorter TUG times). LYMQOL-Leg scores improved across function, symptoms, and emotions. Fitbit® data confirmed adherence to the step goal, facilitating shared use of activity information. [Conclusion] Wearable devices can be integrated into CDT, providing objective, continuous activity data to support adherence and collaborative goal setting. Such monitoring may enhance engagement, optimize exercise under compression, and guide individualized rehabilitation for lymphedema.