L. Pérez-Trabazo, R. J. Barcala-Furelos, L. Peixoto-Pino, and J. Rico-Díaz, “Physical activity in the recess of childhood education: A pilot study using Garmin Vivofit Jr wristbands”, J. Hum. Sport Exerc., vol. 16, no. 1, pp. 1–10, Feb. 2021.