Trampoline-Induced Changes in Pelvic Structure and Continence
NCT ID: NCT07183800
Last Updated: 2025-10-03
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
30 participants
OBSERVATIONAL
2025-07-16
2026-04-30
Brief Summary
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Hypothesis 1: Does a single 10-minute trampoline protocol result in acute changes in pelvic floor structure, including bladder neck position, levator plate length, and/or posterior urethrovesical angle (PUVA)?
Hypothesis 2: Do participants report any urinary leakage during the jumping protocol, despite being asymptomatic at baseline?
Hypothesis 3: Do pelvic morphology changes recover within 30 minutes post-jumping, or do alterations persist?
Researchers will perform within-subject comparisons at multiple time points (pre-jump, immediately post-jump, and 30 minutes post-jump) using transperineal ultrasound imaging to assess structural changes.
Participants will:
* Attend one laboratory visit
* Complete baseline pelvic health questionnaires (ICIQ-UI Short Form and PFD Sentinel).
* Undergo 2D transperineal ultrasound imaging in the standing position at rest, immediately post-jumping, and 30 minutes post-jumping.
* Perform a 10-minute high-intensity jumping protocol on a mini-trampoline, while heart rate and perceived exertion are monitored.
* Verbally report any urine leakage during jumping using standardized descriptors.
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Detailed Description
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This study aims to investigate whether a 10-minute high-intensity trampoline protocol induces measurable changes in pelvic morphology - specifically in bladder neck position, levator plate length, and/or posterior urethrovesical angle (PUVA) - in physically active females aged 18-40 who do not report urinary incontinence symptoms. These anatomical parameters are indicators of pelvic floor support and dysfunction, and their change under load may signal early mechanical strain on the pelvic floor.
Participants will undergo a single study session involving a baseline transperineal ultrasound assessment, a 10-minute jumping bout, and follow-up ultrasound assessments immediately, and 30 minutes post-exercise. Urinary leakage is monitored during jumping via verbal self-report every 2 minutes, with descriptive classifications such as "drops," "squirt," or "gush." Jumping intensity is tracked using the Borg RPE scale and heart rate monitoring via Apple Watch, which has demonstrated acceptable validity for exercise heart rate tracking.
A repeated-measures design will be used to assess within-subject changes in pelvic morphology, with participants serving as their own control across time points. Data will be analyzed using repeated-measures ANOVA to determine statistically significant changes, with Cohen's d effect sizes calculated to assess magnitude of effect. Leakage data will be reported descriptively.
Ultimately, this study will generate foundational data on the immediate biomechanical response of the pelvic floor to high-impact activity. These findings may help identify early indicators of pelvic floor strain, even in women without symptomatic UI, and could inform future screening and prevention strategies for active female populations.
Conditions
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Study Design
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OTHER
CROSS_SECTIONAL
Study Groups
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healthy young active females
18-40yo active females with no self-reported urinary incontinence
Water
Participants will undergo a standardized 10-minute high-intensity trampoline jumping protocol designed to elicit mechanical loading on the pelvic floor. Prior to the jumping session, bladder volume will be assessed via transabdominal ultrasound. If a participant's bladder contains less than 100 mL of urine, they will be asked to drink water and wait until a target range of 100-200 mL is reached to ensure consistent pre-jump bladder filling across participants. This approach minimizes variability in bladder volume, which could influence pelvic floor measurements.
Interventions
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Water
Participants will undergo a standardized 10-minute high-intensity trampoline jumping protocol designed to elicit mechanical loading on the pelvic floor. Prior to the jumping session, bladder volume will be assessed via transabdominal ultrasound. If a participant's bladder contains less than 100 mL of urine, they will be asked to drink water and wait until a target range of 100-200 mL is reached to ensure consistent pre-jump bladder filling across participants. This approach minimizes variability in bladder volume, which could influence pelvic floor measurements.
Eligibility Criteria
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Inclusion Criteria
* Engage in regular physical activity or sport
* Do not experience frequent urinary leakage (no more than once per month during exercise, coughing, or sneezing)
* Can complete a 10-minute jumping protocol
Exclusion Criteria
* Have cardiac, pulmonary, metabolic, and/or neurological conditions
* Have a lower body injury that limits your ability to jump
* Have had a hysterectomy and/or incontinence surgery
18 Years
40 Years
FEMALE
Yes
Sponsors
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University of Ottawa
OTHER
Responsible Party
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Dr. Linda McLean
Full Professor
Locations
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University of Ottawa - Lees Campus
Ottawa, Ontario, Canada
Countries
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Facility Contacts
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References
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Other Identifiers
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H-05-25-11551
Identifier Type: -
Identifier Source: org_study_id
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