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Watch your speed: how fast you squat may tell you when to stop

NCT ID NCT07719010

Knowledge-focused Sponsor: South China Normal University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 22, 2026 · Last updated Jul 23, 2026 · Updated 1 time

Summary

This observational study tests whether the percentage of velocity lost during a set of Smith machine back squats can accurately predict how many repetitions remain before failure. Twenty-six resistance-trained men perform squats to failure under both constant-load and chain-based resistance. The goal is to see if velocity loss can serve as a practical tool for prescribing and monitoring training volume.

What this could mean

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

Active substance
variable resistance training (chains) and constant-load resistance training
What this could lead to
If the approach works, it could give trainers and athletes a precise, real-time way to prescribe squat volume without guesswork.
What could go wrong
This is a small, early feasibility study in experienced male lifters only. Results may not apply to other exercises, populations, or real-world gym settings.

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.

Participants

26 people

The number who actually took part.

Started

Oct 2025

Finished

May 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.

Who is studied

Participant characteristics (mean ± standard deviation \[range\]) included: age, 20.4 ± 2.1 (18-25) years; body height, 1.78 ± 0.05 (1.68-1.87) m; body mass, 71.7 ± 7.5 (60.0-91.4) kg; training experience, 3.5 ± 1.8 (1-10) years; and constant-load 1RM, 135.4 ± 17.4 (95-163) kg, corresponding to 1.89 ± 0.21 (1.58-2.28) times body mass.

Ages

18 years and older

Sex

Male 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: * at least 1 year of resistance training experience, performing back squats at least once per week. * proficiency in the Smith machine back squat executed at maximal intended velocity. * a constant-load 1RM of ≥ 1.5 times their body mass. * no reported musculoskeletal injuries in the past three months. Exclusion Criteria: * Voluntary withdrawal or injury. * Not satisfied with inclusion label.

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As listed by the trial registrant

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

Levels of effort Loading configuration

Contacts and locations

Locations

  • School of Physical Education and Sports Science, South China normal university

    Guangzhou, Guangdong, 510006, China