IoT-Based Instrumentation Development for Reaction Time, Kick Impact Force, and Flexibility Index Measurement

Abstract

This paper presents an Internet of Thing (IoT)-based instrumentation development using vibration sensor,force sensor, and Blynk app to obtain the reaction time, kickimpact force, and flexibility index based on visual stimulants.Besides the Blynk app, vibration, and force sensors, othermain components of the prototype are the ArduinoNodeMCU microcontroller, and three LEDs (yellow, red,and green). The developed prototype was able to record thereaction time, kick impact force, and flexibility index. Theseoutputs could be viewed not only on the Organic LightEmitting Diode (OLED) display but also on the smartphonevia the Blynk app interface. To evaluate the performance ofthe developed prototype, four male Silat athletes weighingbetween 61kg to 80kg were recruited for this experiment.They were requested to undergo a Simple Reaction Time(SRT) task which requires them to perform three trials ofthe front kick. From the SRT findings, it can be deducedthat 75% of the participants reacted faster towards greenLED with the fastest reaction time recorded was1485.2±126.7ms compared to yellow and red LEDs. In thefuture, the design of the hardware in terms of circuitry andhardware casing will be improved for a better prototypepresentation. Secondly, a big sample size of subjects anddifferent branches of combat sports will be recruited toassist in further analysis. Furthermore, the sound stimuliwill be included in future studies. Lastly, further researchshould be conducted to assess the effect of colored stimuli onthe reaction time of the athletes