Tyrannosaurus Flex: Finding the "Fair-ly Normal" Grip

July 24, 2026 updated by: University of Minnesota

The purpose of this study is to evaluate the performance of the Dinomometer and establish normative data to inform clinical standards and benchmarks for therapeutic practice.

This is a cross-sectional study designed to collect normative grip strength data from a large sample of the general population in Minnesota. Participants will primarily be recruited from attendees of the Minnesota State Fair. Grip strength will be measured using the Dinomometer, a non-invasive handheld grip strength measurement device.

The study should take approximately 10-15 minutes to complete for each participant including enrollment and completion of study procedures. Follow-up is not required.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is a cross-sectional study designed to collect normative grip strength data from a large sample of the general population in Minnesota. Participants will be primarily recruited from attendees of the Minnesota State Fair, a community event that draws a broad cross-section of individuals across age, sex, height and weight, providing an opportunity to collect normative data that is representative of the general population. The goal of this study is to establish reference values to inform clinical benchmarks for therapeutic use of the Dinomometer.

A designated research booth will be set up at the Minnesota State Fair with signage inviting interested fairgoers to participate in the study. A trained research team member will provide interested participants with a brief explanation of the study. Written informed consent will then be obtained from a parent or guardian on behalf of minor participants, with assent obtained from children as appropriate.

Following consent, the participant will be directed to a trained research team member who will collect demographic information including sex, age, race, ethnicity, county of residence, height, weight, and hand circumference and will log this information into a pre-prepared case report form administered via iPad. No personal identifiers such as names will be collected.

The participant will then be seated comfortably in a chair with the arm adducted and the elbow gently positioned at a 90-degree angle if possible. The research team member will record whether this position was achieved and maintained. Grip strength will be measured using the Dinomometer, a non-invasive handheld grip strength measurement device. Grip strength will be measured on each hand, with short rest breaks and alternation between hands to mitigate the effects of fatigue. Hand size will be measured by taking a circumferential measurement in centimeters of each hand using a standard plasticized dressmaker's tape laid across the distal palmar crease.

The following data will be collected from each participant: age, sex, height, weight, race, ethnicity, county of residence, hand size, hand dominance, grip strength measurements, and whether the standard testing position was achieved and maintained. All data will be recorded in the case report form on an iPad. The Dinomometer is the only device required for participation in this study. It is a non-invasive measurement tool and no drugs or additional investigational agents are required for participation.

The study should take approximately 10-15 minutes to complete for each participant including enrollment and completion of study procedures. Follow-up is not required.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
600

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Corey McGee, PhD, MS, OTR/L, CHT, FAOTA
  • Phone Number: 612-626-5645
  • Email: mcge0062@umn.edu

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Children between the ages of 2-12 year old who demonstrate participation interest and provide informed consent and assent (when appropriate).

Exclusion Criteria:

  • Presence of a known musculoskeletal, neurological, or neuromuscular condition affecting upper limb strength or function (including, but not limited to, cerebral palsy, brachial plexus injury, muscular dystrophy, etc.)
  • Diagnosis of a systemic condition affecting the musculoskeletal or nervous system
  • Previous hand, wrist, or upper limb surgery
  • History of hand, wrist, or upper limb trauma
  • Current pain in either hand or upper limb
  • Persons unable to follow standardized commands when presented to them in English

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Dinomometer Grip Strength Assessment
Participants will complete grip strength measurements using the Dinomometer, a non-invasive handheld grip strength measurement device. Grip strength will be measured on each hand, with short rest breaks and alternation between hands to mitigate the effects of fatigue.
Device: Dinomometer
The investigational device being evaluated in this study is the Dinomometer, a handheld grip strength measurement device designed for use in pediatric populations. The Dinomometer will be used to collect grip strength measurements from participants at the Minnesota State Fair. No drugs, biologics, or additional investigational agents are involved in this study.
Other Names:
  • Handheld grip strength measurement device

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Collection of normative grip strength data using the Dinomometer
Time Frame: During a single study visit lasting approximately 10-15 minutes
The primary outcome is the collection of normative grip strength data from a large sample of the general population in Minnesota using the Dinomometer. These data will be used to establish reference values and benchmarks to inform clinical interpretation of Dinomometer measurements in therapeutic settings.
During a single study visit lasting approximately 10-15 minutes

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Grip strength variability across demographic subgroups
Time Frame: During a single study visit lasting approximately 10-15 minutes
Secondary outcomes include the characterization of grip strength variability across demographic subgroups, including age, sex, height and weight. These data will inform the development of stratified normative reference values to support clinician decision-making across a range of patient populations.
During a single study visit lasting approximately 10-15 minutes

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Minnesota

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Corey McGee, PhD, MS, OTR/L, CHT, FAOTA, University of Minnesota

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 2, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 20, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 24, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 29, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 24, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • STUDY00028771

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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