Your feet are a major source of power and the only connection you have to the ground as you take off in a run, a jump, or a major lift. Treat them well.
Many chronically overtrained BJJ athletes come my way with burnout, and to top it all off, they are frustrated because they can’t lose weight even with all the training.
There isn't any convincing evidence showing fat loss causes metabolic damage; however, observations are more indicative of reversible adaptive thermogenesis.