NCT07635303

Brief Summary

The purpose of this study is to determine if drinking a hot cup of coffee immediately before taking a 20-minute nap (the "Caffeine Nap") reduces the standard "grumpiness index" upon waking compared to drinking decaffeinated bean-water.

Trial Health

65
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
50

participants targeted

Target at P25-P50 for not_applicable

Timeline
23mo left

Started Jul 2026

Typical duration for not_applicable

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress4%
Jul 2026Jul 2028

First Submitted

Initial submission to the registry

June 3, 2026

Completed
6 days until next milestone

First Posted

Study publicly available on registry

June 9, 2026

Completed
22 days until next milestone

Study Start

First participant enrolled

July 1, 2026

Completed
1 year until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2027

Expected
1 year until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2028

Last Updated

June 9, 2026

Status Verified

June 1, 2026

Enrollment Period

1 year

First QC Date

June 3, 2026

Last Update Submit

June 3, 2026

Conditions

Irritability

Keywords

Caffeine, Napping, Grumpiness, Office Survival, Espresso

Outcome Measures

Primary Outcomes (1)

  • Post-Nap Grumpiness Score

    Measured using the proprietary Grump-O-Meter Scale (0 to 10, where 0 is "delightful" and 10 is "don't look at me or I will quit").

    Exactly 90 seconds post-air horn blast.

Study Arms (2)

The Turbo Sleepers

EXPERIMENTAL

Participants receive 200mg of liquid caffeine disguised in a lukewarm mug of dark roast coffee, followed by an immediate attempt to sleep.

Other: Coffee

The Placebo Pouters

PLACEBO COMPARATOR

Participants receive 0mg of caffeine in an identical lukewarm mug of decaf bean-water, followed by an immediate attempt to sleep.

Other: Placebo

Interventions

CoffeeOTHER

It's literally coffee

The Turbo Sleepers
PlaceboOTHER

It's a placebo

The Placebo Pouters

Eligibility Criteria

Age18 Years - 99 Years
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Must look visibly tired by 2:00 PM.
  • Must have a self-reported history of sighing heavily at emails.
  • Must be capable of falling asleep under duress.

You may not qualify if:

  • People who are "morning people" and smile before 8:00 AM (excluded due to baseline psychological bias).
  • Inability to tolerate lukewarm coffee.
  • Current employment as a mattress tester.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

MeSH Terms

Interventions

Coffee

Intervention Hierarchy (Ancestors)

Plant PreparationsBiological ProductsComplex MixturesBeveragesDiet, Food, and NutritionPhysiological PhenomenaFood and Beverages

Central Study Contacts

Brad P Guy in Charge

CONTACT

405-555-5555brad@hightowerclinical.com

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
PARTICIPANT
Purpose
OTHER
Intervention Model
PARALLEL
Sponsor Type
NETWORK
Responsible Party
SPONSOR

Study Record Dates

First Submitted

June 3, 2026

First Posted

June 9, 2026

Study Start

July 1, 2026

Primary Completion (Estimated)

July 1, 2027

Study Completion (Estimated)

July 1, 2028

Last Updated

June 9, 2026

Record last verified: 2026-06