Current studies

• Wearable · G-theoryReliability of sleep timing and physical activity measures from adolescent Fitbit dataOngoing
• AccelerometryCircadian activity-rhythm indicators from KNHANES raw accelerometer dataOngoing
• Systematic reviewAdherence to analytic and reporting standards (Welk et al., 2019) in wearable validation studiesOngoing
• Cohort · KoGESCumulative resistance and aerobic activity and mortality (KoGES Ansan–Ansung cohort)Ongoing
• Cohort · NHISBone density screening, physical activity, and fracture risk in older womenOngoing
• Sports dataGeneralizability analysis of open tennis match-charting dataOngoing
• Panel · KCYPSLeisure-time physical activity and socioemotional competence trajectories in Korean adolescents: A sex-stratified analysisOngoing
• PE · AIAI use among physical education practitionersOngoing
• Exercise intensity · HRExercise intensity by turning technique in on-snow versus indoor treadmill skiingOngoing
• Fitness norms · PAPSFitness percentile norms and grading standards for grades 1–6 (LMS method, external validation with National Fitness Award 100 data)Ongoing

Funded projects

• 2021–2023 · Korea Sports Promotion FoundationSports data trading technology for the digital transformation of small and medium-sized sporting goods manufacturers (Co-PI)Completed
• 2021–2022 · Korea Sports Promotion FoundationSmart sports devices for home training and gamification services (Co-PI)Completed
• 2019–2020Development of a physical fitness test for Korean police officers (PI)Completed
• 2023–2024 · Kyung Hee UniversityKyung Hee Fellow Research AwardCompleted