Cahyo Yuwono, S. Adi, Tommy Soenyoto, Sri Indah Ihsani, Made Bang Redy Utama, Hilmy Aliriad, Khoiril Anam, Widya Hari Cahyani, Laily Mita Andriana, Mahenderan Appukutty
Background. Relay performance depends on both individual speed and the efficiency of baton exchanges. However, conventional batons lack quantitative feedback to guide training. Objectives. This study aimed to develop and evaluate a Smart IoT Relay Baton equipped with an accelerometer to provide objective, real-time performance data. Materials and Methods. A modified R&D approach by Borg and Gall was used, involving needs analysis, system design, expert validation, small/large-scale trials, product revision, and finalization. The prototype used an accelerometer + NodeMCU ESP32, MQTT streaming, and a web dashboard. The participants were 241 sprint relay athletes (19–23 years). Baseline runs with conventional batons were followed by identical runs with the IoT baton. The outcomes included the measurement of transition time, entry speed, average acceleration, and team coordination (sync delay). The statistical analysis employed comprised using the Shapiro–Wilk test, paired t-tests, Cohen’s d, and Pearson correlations (α=.05). Results. Significant improvements were observed across all variables: transition time −9.97%, entry speed +9.85%, average acceleration +8.98%, and coordination +24.21% (all p <.05). Effect sizes were large to very large (d=0.70–1.20). Correlations highlighted strong links between entry speed and acceleration (r=.74), as well as between transition time and coordination (r=.68). Conclusions. The IoT baton effectively supported coaches with accurate evaluations and strategic decision-making. These findings underscore the transformative role of IoT-based devices in advancing evidence-based sprint training. Further research should validate the tool in official competitions, integrate biometric and video-tracking technologies. © Yuwono, C., Adi S, Soenyoto, T., Ihsani, S. I., Utama, M. B. R., Aliriad, H., Anam, K., Cahyati, W. H., Andriana, L. M., & Appukutty, M., 2025.
Physical Education Department, Universitas Negeri Semarang, Sekaran, Gn. Pati, Jawa Tengah, Kota Semarang, 50229, Indonesia; Department of Sports Science, Universitas Negeri Jakarta, Pulo Gadung, Jakarta, Kota Jakarta Timur, 13220, Indonesia; Sport Coaching Department, Universitas Negeri Jakarta, Pulo Gadung, Jakarta, Kota Jakarta Timur, 13220, Indonesia; Physical Education Department, Universitas Nahdlatul Ulama Sunan Giri, Jawa Timur, Bojonegoro, 62115, Indonesia; Sport Science Department, Universitas Negeri Semarang, Sekaran, Gn. Pati, Jawa Tengah, Kota Semarang, 50229, Indonesia; Public Health Department, Universitas Negeri Semarang, Sekaran, Gn. Pati, Jawa Tengah, Kota Semarang, 50229, Indonesia; Sport Coaching Department, Faculty of Sports and Health science, Universitas Negeri Surabaya, Jl. Lidah Wetan, No. 8, Lidah Wetan, East Java, Surabaya, 60231, Indonesia; Sports Science Programme, Faculty of Sports Science and Recreation, Universiti Teknologi MARA, Selangor, Shah Alam, 40450, Malaysia
