Pacheco-Barrios, K., Gianlorenço, A.C. , Machado, R., Queiroga, M., Zeng, H. , Shaikh, E., Yang, Y., Nogueira, B., Castelo-Branco, L. and Fregni, F. 2020. Exercise-induced pain threshold modulation in healthy subjects: a systematic review and meta-analysis . Principles and Practice of Clinical Research. 6, 3 (Sep. 2020). DOI:https://doi.org/10.21801/ppcrj.2020.63.2.