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NCT Number: NCT07711340

Diurnal Strength Variation

Healthy individuals will be tested at different times of day to determine whether exercise at a non-expected time results in poorer performance.

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Key information

Conditions

Healthy Adult Behavior Exercise Motor Activity

Age range

18 year–25 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 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 criteria

  • Active or uncontrolled mental or physical health issues
  • Current musculoskeletal injury

Treatment and study plan

Time-driven dosing

Behavioral

Three hours earlier or later than usual exercise

Primary outcomes

  1. Isometric quadriceps strength

    Time frame: 15 minutes

    isometric quadriceps strength as determined during dynamometer testing

Secondary outcomes

  1. Isometric hamstring strength

    Time frame: 15 minutes

    Hamstring strength as determined during dynamometer testing

  2. Isokinetic hamstring/quad strength

    Time frame: 15 minutes

    Hamstring/quad strength as determined during dynamometer testing

Study contacts

Contact information is provided by the study sponsor or research team.

Jason Liu

CONTACT

[email protected]

650-493-5000 1-1-62410

Sponsors and collaborators

Lead sponsor

Stanford University

Other

Registry information

Official study title

Exercise Timing and Lower Limb Biomechanics

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Jul 17, 2026
Registry last updated
Jul 17, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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