A recent study published in PLOS One examined the relationship between age and various physical metrics, including grip strength, knee strength, and balance. The study found a strong correlation between age and the ability to stand on one leg, particularly for the non-dominant leg. This correlation suggests that the time it takes to stand on one leg may serve as a good indicator of physical aging, although more research is needed to confirm this. A separate study published in Nature Aging found that significant changes in body chemistry occur at ages 44 and 60, potentially contributing to age-related decline.