What is unexplained physical resilience, and how do some individuals endure extreme physical conditions?

Unexplained physical resilience refers to the extraordinary ability of some individuals to withstand extreme physical conditions, such as high temperatures, severe pain, or intense physical stress. This resilience can be attributed to factors such as genetic predisposition, mental fortitude, or specialized training. Examples include individuals who can endure extreme cold or heat, perform superhuman feats of endurance, or recover rapidly from injuries. These abilities often involve a combination of physiological adaptations and psychological factors.