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Which running plan works best? study tests three intensity strategies

NCT ID NCT07565168

Knowledge-focused Sponsor: Universidad Rey Juan Carlos Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at three different ways to distribute training intensity—polarized, pyramidal, and threshold—in recreational distance runners. Twenty-four runners followed an 8-week program to see which method improved their endurance, running economy, and 5-kilometer time trial performance the most. The goal is to help runners train smarter based on scientific evidence.

What this could mean

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

What this could lead to
If successful, this study could help recreational runners choose the most effective training intensity plan to improve their endurance and race times.
What could go wrong
This is a small, completed study with only 24 participants, so results may not apply to all runners. It compares training methods, not a treatment, so no major risks are involved.

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

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

24 people

The number who actually took part.

Started

Apr 2024

Finished

Apr 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 60 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * age ≥ 18 years; * a habitual training frequency of ≥ 4 sessions·week * running experience ≥ 2 years; * absence of musculoskeletal injuries in the preceding 3 months Exclusion Criteria: * an official 10-km race time \> 40:00 min:s for men and \> 50:00 min:s for women * any cardiometabolic disease

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As listed by the trial registrant

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

Aerobic performance Endurance exercise Endurance training adaptations in runners Exercise physiology Running performance Training intensity distribution (TID)

Contacts and locations

Locations

  • Cam. del Molino, 5, Fuenlabrada, Madrid

    Fuenlabrada, Madrid, 28943, Spain

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