About this trial
The frequency and severity of heat waves has increased in the last decades. Older adults (over 65 years) have impaired responses to heat stress making them at increased risk for adverse events. Previous heat waves report that women over 65 experience worse health outcomes than any other age group and age matched men.
Aging and reproductive hormones, specifically estrogen, independently alter responses to heat stress. However, the combined effects of low estrogen following menopause and aging on the response to heat stress are unknown. In this study, the investigators will identify the role of estrogen in pre and post menopausal women on thermoregulatory responses to heat stress.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Women ages 42-64
Disqualifiers
Chron's disease, diverticulitis, or similar gastrointestinal disease
Abnormal resting exercise electrocardiogram (ECG)
Tobacco use
High-risk determined by the Atherosclerotic Cardiovascular Disease (CVD) Risk Factor
Trial design
Crossover
Treatments tested in this trial
Elagolix Oral Tablet
Drug2 x 200 mg tablet
Estradiol patch
Drug0.05 mg/day patch
cellulose placebo
Other interventionplacebo tablet
placebo patch
Other interventionplacebo patch
Treatment groups
Trial outcomes
Primary outcomes
Skin Blood Flow
Skin blood flow response to whole body heating is continuously monitored
Local Sweat Rate
A small sweat capsule is placed on the forearm for the duration of whole body heating.
Core Temperature
Changes in body temperature are measured through a telemetry pill swallowed before each experiment.
Secondary outcomes
Body Mass
Body mass is measured on a scale.
Skin Temperature
Mean skin temperature is calculated from a weighted average of skin temperature from 4 different sites.
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