Research on the Accurate Measurement Method of Athletes’ Physical Consumption Using Intelligent Wearable Devices in Table Tennis Training

ActiGraphGT9X was applied to collect the energy consumption of table tennis and establish the multiple regression equations suitable for the prediction of energy consumption in table tennis, so as to enrich the ActiGraph measurement system. Using the K4b2 measurement value as the calibration, accelerometers were worn on the handle of the racket, the outside of the wrist of the racket holder, the outside of the iliopsoas muscle at the waist, the front side of the center of the thigh, and the outside of the ankle (the same limb as that of the racket holder), and accelerometers were used to synchronously monitor the in-situ forehand and backhand strokes, the sideways movement forehand and backhand strokes, the forward movement forehand and backhand strokes, the sideways movement forehand and backhand alternate strokes, and simulated free singles under different ball velocities. Perform monitoring. There was a significant underestimation of EE and MET predictions for GT3X at the waist, thigh and ankle regions, with low agreement with K4b2 measurements, and a significant overestimation of EE and MET predictions for GT3X at the wrist and racket handle regions, with low agreement with K4b2 measurements. The study established two regression equations for predicting energy consumption in tennis, and their predicted values were tested to be not significantly different from the measured values. It is more feasible to use an Actigraph accelerometer to measure physical energy consumption in table tennis.