Commentary: “You're Only as Strong as Your Weakest Link”: A Current Opinion About the Concepts and Characteristics of Functional Training - Ide, Bernardo N.; Marocolo, Moacir; Santos, Clarcson P. C.; Silva, Bruno V. C.; Silvatti, Amanda Piaia; Simim, Mário Antonio Moura; Oranchuk, Dustin J.; de Agostini, Guilherme Goulart; Mota, Gustavo R. (Frontiers in Physiology, 2021)