Body clock vs. workout clock: can exercising at the 'wrong' time weaken your legs?

NCT ID NCT07711340

Not yet recruiting Knowledge-focused Sponsor: Stanford University Source: ClinicalTrials.gov ↗

First seen Jul 17, 2026 · Last updated Jul 17, 2026

Summary

This study looks at whether exercising at an unexpected time of day affects leg strength and performance. Healthy adults aged 18-25 who usually exercise at the same time each day will be asked to work out three hours earlier or later than normal. Researchers will measure their leg muscle strength to see if the change in timing makes a difference.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: time-driven dosing (behavioral intervention: exercising three hours earlier or later than usual)
What this could lead to: If it works, this could help athletes and coaches optimize training schedules for better performance.
What could go wrong: This is a small, early-stage study with only 20 participants, so results may not apply to everyone. The effect of timing on performance may be small or absent.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for EXERCISE are added.

Our safety recommendation!

By submitting, you agree to our Terms of use

Conditions

The condition(s) this trial relates to.

Motor Activity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

EXERCISE HEALTHY ADULT

Contacts and locations

Locations

Stanford University

Stanford, California, 94305, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.