Basal body temperature as a biomarker of healthy aging.

Abstract in brief

• The study suggests that in nonadipose older adults, a lower basal body temperature is linked to healthier aging indicators such as faster walking speed and less exertion during physical activity.
• In contrast, among individuals with excess body fat (adiposity), this relationship is reversed or less clear, indicating that body composition may influence how temperature correlates with physical function.
• Over a long period, baseline temperature did not predict functional decline in the overall group, but in those with excess adiposity, lower temperatures were associated with more decline, highlighting the complex role of adiposity in aging and body temperature regulation.]