An interventional study of Normal Stance and Inward Anchoring in Healthy Adult Participants, sponsored by University of Central Florida. Recruiting at 1 site in United States. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-09-24.
Sponsored by University of Central Florida · Not applicable, Interventional, and Screening
This study will compare standing balance in adults ages 18 to 50 during normal standing, inward anchoring, and outward anchoring. Anchoring involves standing with the feet wider than shoulder width and trying to pull the legs together or push them apart without moving the feet. Participants will complete all three conditions in a randomly assigned order. A researcher will use a handheld force-measuring instrument at six points on the pelvis to measure how much pressure participants can resist before a foot lifts from the floor. Participants will also rate how stable they feel after each anchoring condition. The first 18 participants will repeat assessments to evaluate measurement consistency. Participation is expected to last 60 minutes, or 90 minutes for those completing repeat assessments.
The study will enroll 72 adults from the University of Central Florida community. Participants will be randomized with equal probability to one of six counterbalanced orders of normal stance, inward anchoring, and outward anchoring. Every participant will complete all three conditions.
Inward anchoring involves attempting to draw the legs toward one another without moving the feet. Outward anchoring involves attempting to press the legs away from one another without moving the feet. Both anchoring conditions use a stance wider than shoulder width. Participants will wear their usual athletic footwear.
The same tester will apply a microFET2 handheld dynamometer at the right and left anterior superior iliac spines, iliac crests, and posterior superior iliac spines. Applied pressure will increase until the sole of the foot closest to the tester leaves the floor, at which point force will be recorded in newtons. Each site will be tested three times in each stance. Rest periods will be one minute between sets within a stance and two minutes between stances. Instructions for the next stance will be given during the final minute of the between-stance rest period.
After each anchoring condition, participants will rate perceived stability. The first 18 participants will complete additional repeat assessments for intrarater reliability analysis. The protocol plans repeated-measures analyses for stance/order comparisons and intraclass correlation coefficients for reliability.
University of Central Florida is the lead sponsor of 104 studies on the registry; 42 are open to participants now.
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Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants complete normal stance, then inward anchoring, then outward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.
Other: Normal Stance · Other: Inward Anchoring · Other: Outward Anchoring
Participants complete normal stance, then outward anchoring, then inward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.
Other: Normal Stance · Other: Inward Anchoring · Other: Outward Anchoring
Participants complete outward anchoring, then normal stance, then inward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.
Other: Normal Stance · Other: Inward Anchoring · Other: Outward Anchoring
Participants complete outward anchoring, then inward anchoring, then normal stance. The same force assessments are performed in each condition, with two minutes of rest between conditions.
Other: Normal Stance · Other: Inward Anchoring · Other: Outward Anchoring
Participants complete inward anchoring, then normal stance, then outward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.
Other: Normal Stance · Other: Inward Anchoring · Other: Outward Anchoring
Participants complete inward anchoring, then outward anchoring, then normal stance. The same force assessments are performed in each condition, with two minutes of rest between conditions.
Other: Normal Stance · Other: Inward Anchoring · Other: Outward Anchoring
Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques
Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.
Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.
Mean Break-Point Force at the Right Anterior Superior Iliac Spine
A microFET2 handheld dynamometer is applied at the right anterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance
Time frame: Day 1
Mean Break-Point Force at the Left Anterior Superior Iliac Spine
A microFET2 handheld dynamometer is applied at the left anterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.
Time frame: Day 1
Mean Break-Point Force at the Right Iliac Crest
A microFET2 handheld dynamometer is applied at the right iliac crest during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance
Time frame: Day 1
Mean Break-Point Force at the Left Iliac Crest
A microFET2 handheld dynamometer is applied at the left iliac crest during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.
Time frame: Day 1
Mean Break-Point Force at the Right Posterior Superior Iliac Spine
A microFET2 handheld dynamometer is applied at the right posterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.
Time frame: Day 1
Mean Break-Point Force at the Left Posterior Superior Iliac Spine
A microFET2 handheld dynamometer is applied at the left posterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.
Time frame: Day 1
Perceived Stability Rating After Inward Anchoring
After inward anchoring, participants answer how stable they felt during that stance. Ratings range from 0 (not at all stable) to 10 (completely stable); 5 means neutral, or the same stability as normal standing. Higher scores indicate greater perceived stability.
Time frame: Day 1
Perceived Stability Rating After Outward Anchoring
After outward anchoring, participants answer how stable they felt during that stance. Ratings range from 0 (not at all stable) to 10 (completely stable); 5 means neutral, or the same stability as normal standing. Higher scores indicate greater perceived stability
Time frame: Day 1
Plan to share: No
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