Related Experiment Videos
Effects of aging on human cold tolerance.
1US Army Research Institute of Environmental Medicine, Natick, MA 01760-5007.
Experimental Aging Research
|January 1, 1991
Summary
Older men show reduced ability to maintain body temperature during cold exposure compared to younger men. However, older women defend core temperature as well as younger women, suggesting aging effects may be sex-specific.
Area of Science:
- Physiology
- Gerontology
- Environmental Health
Background:
- Hypothermia risk is thought to increase with age due to diminished thermoregulation.
- Previous studies suggest older individuals are more susceptible to cold stress.
- Home environment studies may not accurately reflect thermoregulatory capacity under controlled conditions.
Purpose of the Study:
- To compare thermoregulatory responses to cold stress in younger and older adults.
- To investigate potential sex differences in age-related thermoregulation.
- To explore factors beyond aging that influence cold tolerance.
Main Methods:
- Laboratory experiments involving controlled cold exposure.
- Comparison of core body temperature maintenance between age groups and sexes.
- Measurement of metabolic heat production and cutaneous vasoconstriction.
Main Results:
- Older men exhibited a reduced ability to defend core body temperature compared to younger men.
- Older men showed a smaller increase in metabolic heat production and slower vasoconstriction.
- Older women maintained core temperature as effectively, or better than, younger women.
Conclusions:
- Age-related impairment in thermoregulation during cold exposure may be specific to men.
- Sex differences exist in the response to cold stress among older adults.
- Further research is needed to determine if factors like body composition and fitness, rather than aging itself, contribute to impaired thermoregulation.