Diurnal Strength Variation Study

This study is looking at how changing your usual exercise time affects your muscle strength. Researchers want to see if exercising three hours earlier or later than your normal time impacts your quadriceps (thigh muscle) strength. You might be able to join if you are a healthy adult between 18 and 25 years old, exercise your lower body at least three times a week at the same time each day, and have regular meal and sleep times. The study aims to understand if exercising at an unexpected time leads to poorer performance. The current recruitment status is unclear, and the study plans to enroll 20 participants.

Study design
This is an interventional study with 20 planned participants. It tests how changing exercise times affects strength.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Quadriceps strength will be measured at 15 minutes after the intervention.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07711340

Diurnal Strength Variation

Not Yet Recruiting
NAAges 18–25InterventionalBasic science
Stanford University
~20 participants
Updated 2026-07-17 on ClinicalTrials.gov
What's tested:Time-driven dosing

At a glance

Recruiting sites
0 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Isometric quadriceps strength
Measured over 15 minutes
Healthy Adult
Exercise
1 sites across 1 states
California1

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Eligibility criteria

Inclusion

Healthy
18-25 years old
Lower body exercise three or more times per week, all at the same time of day (within 2 hour window)
Regular meal times (±1 hour window)
Regular sleep times (±1 hour window)

Exclusion

Active or uncontrolled mental or physical health issues
Current musculoskeletal injury
  • Isometric quadriceps strength15 minutes

    isometric quadriceps strength as determined during dynamometer testing