The goal of this interventional study is to learn if wearing an external nasal dilator strip while sleeping changes objective and perceived sleep quality, immediate post-waking blood pressure, and immediate-post waking heart rate variability.

Nasal dilator strips are strips often made up of stiff plastic, placed on the lower bridge of the nose by an adhesive strip. They work by slightly pulling the nostrils and surrounding nose bridge area outward, dilating the nostrils, and decreasing air resistance. Nasal breathing is associated with lower diastolic blood pressure, an important marker of heart health, in comparison to mouth breathing. In addition to blood pressure, nasal breathing during sleep is potentially related with better sleep quality. Participating in this study will help us understand the effect nasal dilator strips have on cardiovascular and sleep health. Better understanding of the benefits of nasal dilator strips will provide important knowledge to researchers who study how the body works.

Inclusion Criteria:

• Age 18-30
• BMI <30
• Has a smartphone and is willing to download EliteHRV and OMRON mobile applications.
• Able to use a nasal dilator strip

Exclusion Criteria:

• Overt cardiovascular (e.g., diagnosed hypertension), respiratory, neurological, renal, liver, and/or metabolic health conditions.
• Current or recent (regular use within the past 6 months) use of tobacco or nicotine products (e.g., cigarettes).
• Currently pregnant, trying to become pregnant, or lactating.
• Inability to breathe through the nose.

Data with all HIPAA identifiers removed may be shared in future collaborative efforts pending appropriate data and/or material transfer agreement approvals.

One year after completion of the trial, indefinitely

A formal plan identifying the intended use of the data and proper completion of appropriate data and/or material transfer agreement approvals with the study PI and their institution.