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Falls Risk, Circadian Rhythms and Melatonin: Current Perspectives.

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Aging weakens the body's internal clock, increasing fall risk in older adults. Melatonin levels also drop with age, potentially contributing to falls. Understanding these circadian rhythm changes may help prevent falls.

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Area of Science:

  • Gerontology
  • Chronobiology
  • Physiology

Background:

  • Aging is linked to a decline in circadian system amplitude and increased lability of circadian phase.
  • Falls in older individuals may exhibit circadian variations, necessitating an understanding of their timing.
  • Aging processes are associated with autonomic dysfunction and altered heart rate variability, impacting orthostatic tolerance.

Purpose of the Study:

  • To review the relationship between fall risk in older persons and the role of circadian rhythms.
  • To explore the potential of melatonin's circadian rhythm in mitigating fall risk.
  • To inform healthcare workers about fall risk factors and potential interventions related to circadian rhythms and melatonin.

Main Methods:

  • Narrative review of existing literature.
  • Assessment of circadian variations in physiological parameters and their relation to falls.
  • Examination of the role of autonomic nervous system activity and melatonin in aging and fall risk.

Main Results:

  • Reduced circadian amplitude and phase shifts are characteristic of aging.
  • Circadian rhythms influence physiological variables, and their disruption may increase fall incidence.
  • Decreased circadian amplitude of melatonin with age is a potential factor in increased fall risk.

Conclusions:

  • Understanding circadian rhythms and their age-related changes is crucial for fall prevention in older adults.
  • Timing of medical treatments based on circadian patterns may reduce falls.
  • Melatonin supplementation could be a potential countermeasure for age-related fall risk.