Overview

This study is being done to find out whether extending sleep for at least an hour per night, seven days a week, predicts a higher tolerance and a higher threshold for pain. This is a 21-day study. Participants will be asked to wear sleep- and heart- monitoring watches. Pressure pain and cold pain will be measured at study visits.

Eligibility

Inclusion Criteria:

1. 18 to 24 (inclusive) years of age at enrollment
2. Fluent English speaker and reader
3. Willing to refrain from initiating new therapeutic interventions (e.g., medication; behavioral) designed to target sleep or pain for the duration of study participation

Exclusion Criteria:

1. Diagnosed with a sleep disorder
2. Diagnosed with a pain disorder
3. Has experienced a cold-related injury frostbite or has any other nerve damage to the feet
4. Has a history of injury to any of the muscular measurement sites for pain (I.e. shoulder, jaw, forearm)
5. Diagnosed with hypertension or cardiovascular disease
6. Evidence of hypertension
7. Diagnosed serious mental health disorder or substance use disorder
8. Taking any physician-directed pharmacologic intervention for sleep
9. Taking any physician-directed pharmacologic intervention for pain
10. Personal health history of traumatic brain injury
11. Pregnant
12. Current smoker