Among the many changes as we age are a loss of flexibility, muscle mass and strength, balance, and weight gain. All these factors are found among the frail and not-so-frail in varying measures.
Balance
Being balanced is a complicated “dance” of sensory inputs from our nerves, indicating where there is more or less pressure, the vestibular system’s “little stones,” the otoconia, and our visual system that knows the horizon should be horizontal.