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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Sleep Extension | Experimental | 1 week of >1 hour increased time in bed |
|
| Control | No Intervention | Sustained sleep behavior |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Sleep extension | Behavioral | >1 hour additional time in bed per night for 1 week. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in pressure pain threshold from before to after sleep extension | Bilateral response to a clinically standard algometer at 3 different physical palpation sites. A higher pressure reading indicates a better pain response. | Momentary at study visit 2 (at the end of week1) and a week later at study visit 3 (at the end of week2). |
| Change in pressure pain tolerance from before to after sleep extension | Bilateral response to a clinically standard algometer at 3 different physical palpation sites. A higher pressure reading indicates a better pain response. | Momentary at study visit 2 (at the end of week1) and a week later at study visit 3 (at the end of week2). |
| Change in weekly average of momentary pain self-reports from before to after sleep extension | Intermittent pain intensity using a Visual Analog Scale (0-100, where 0 = "no pain", 100 = "worst pain imaginable in current circumstances"). Higher values indicated more pain, and a negative change indicates a decrease in pain. | (averaged) Daily surveys during study week 1 (pre-intervention) and study week 2 (intervention) |
| Change in thermal pain threshold from before to after sleep extension | Latency to respond to a bilateral cold pressor test (feet). A longer latency to threshold indicates better pain response. | Momentary at study visit 2 (at the end of week1) and a week later at study visit 3 (at the end of week2). |
| Change in thermal pain tolerance from before to after sleep extension | Latency to respond to a bilateral cold pressor test (feet). A longer latency to tolerance indicates better pain response. | Momentary at study visit 2 (at the end of week1) and a week later at study visit 3 (at the end of week2). |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Pennsylvania State University | University Park | Pennsylvania | 16802 | United States |
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The data will be shared within one year after the first publication related to primary outcomes.
Request for data should be made in writing to the PI.
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| ID | Term |
|---|---|
| D010146 | Pain |
| ID | Term |
|---|---|
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| Change in pain inhibition from before to after sleep extension | Pain inhibition is measured as the difference in pressure pain threshold from before to after cold pressor procedure. A reduction in pressure pain threshold is typical after cold pressor procedure. A greater reduction in pain threshold indicates a better response of the pain inhibitory system. | Momentary at study visit 2 (at the end of week1) and a week later at study visit 3 (at the end of week2). |