Deep body temperature, used as a marker of physiological warm-up readiness.
Core temperature reflects the temperature of deep body tissues rather than skin, and rises predictably with active exercise. In sports science it serves as a proxy for 'readiness': a substitute entering with lower core temperature than on-pitch players may be less physiologically primed for immediate high-intensity effort, though the practical significance of a given temperature gap is often untested directly.
This guide was auto-drafted and is pending editorial review.