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Which training boosts volleyball performance more? small study tests HIIT vs functional workouts

NCT ID NCT07181031

Knowledge-focused Sponsor: Duvenciler Anadolu Lİsesi Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at 32 female volleyball players aged 15-18 to see if high-intensity interval training (HIIT) or high-intensity functional training (HIFT) improves performance more. Players did their assigned training twice a week for 12 weeks, in addition to regular practice. Researchers measured jumping, sprinting, agility, and volleyball skills before and after the program.

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 the results show one training method is clearly better, it could help coaches design more effective practice routines for young athletes.
What could go wrong
This is a small, completed study with only 32 participants, so the findings may not apply to all athletes or settings. The differences between groups might be small or due to chance.

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

32 people

The number who actually took part.

Started

Sep 2021

Finished

Jan 2022

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

15 to 18 years

Sex

Female participants only

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: * Female volleyball players aged 15-18 years * Licensed athletes competing in a regional league * Minimum of 2 years of regular volleyball training experience * Healthy, without chronic illness or musculoskeletal injury * Provided informed consent (with parental/guardian approval for minors) Exclusion Criteria: * Current musculoskeletal injury or recent surgery * History of chronic disease (e.g., cardiovascular, metabolic, respiratory) * Regular use of medication, nutritional supplements, alcohol, or tobacco * Non-compliance with training sessions or inability to complete testing procedures * Decline of informed consent or parental permission

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As listed by the trial registrant

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

Aerobic capacity Agility Explosive strength Motor skill development Neuromuscular function Sports performance Youth volleyball

Contacts and locations

Locations

  • Marmara University, Faculty of Sport Sciences Research Center

    Istanbul, Turkey (Türkiye)

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