Trampoline-Induced Changes in Pelvic Structure and Continence

NCT07183800 | Recruiting

• 1 other identifier: H-05-25-11551
• Study Type: observational
• Target: 30
• Locations: 1 country
• Sites: 1

Brief Summary

The goal of this clinical trial is to evaluate whether a short bout of high-intensity trampoline jumping induces urinary leakage or measurable changes in pelvic floor morphology in active females aged 18-40 who do not report symptoms of urinary incontinence. The main questions it aims to answer are: 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.

Conditions

Urinary Continence; Urinary Incontinence; Urinary Incontinence (UI); Urinary Incontinence , Stress

Keywords

stress urinary incontinence; pelvic floor; pelvic floor morphology; high impact exercise; urine leakage; urinary symptoms; levator plate; female athletes; bladder neck; posterior urethro-vesical angle; PUVA; jump; trampoline; high impact; high intensity; healthy female; incontinence; leakage; urinary leakage

Outcome Measures

Primary Outcomes (1)

• Assessing whether a short-duration trampoline protocol induces urinary leakage in active females.

  Urinary leakage is assessed via self-report during a 10-minute high-intensity trampoline jumping protocol. Every 2 minutes, participants are verbally prompted to report whether they experienced leakage, and to classify it using standardized descriptors ("drops," "squirt," or "gush"). Leakage severity is indexed based on the timing of first report, frequency of episodes, and qualitative volume descriptors. Descriptive statistics will be used to report the proportion of participants who leak, frequency of leakage, and severity profiles.

  Urinary leakage is assessed during the 10-minute jumping protocol on the single lab visit.

Secondary Outcomes (3)

• Assessing whether a short-duration trampoline protocol induces acute changes in bladder neck morphology in active females.

  Bladder neck morphology outcomes are assessed across a single session spanning approximately 45-60 minutes (baseline through 30 minutes post-exercise).

• Assessing whether a short-duration trampoline protocol induces acute changes in levator plate length in active females.

  Levator plate length outcomes are assessed across a single session spanning approximately 45-60 minutes (baseline through 30 minutes post-exercise).

• Assessing whether a short-duration trampoline protocol induces acute changes in the posterior urethrovesicle angle (PUVA) in active females.

  Posterior urethrovesicle angle (PUVA) outcomes are assessed across a single session spanning approximately 45-60 minutes (baseline through 30 minutes post-exercise).

Study Arms (1)

healthy young active females

18-40yo active females with no self-reported urinary incontinence

Other: Water

Interventions

Water OTHER

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.

healthy young active females

Eligibility Criteria

• Age: 18 Years - 40 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Participants will be recruited from the Ottawa region through local gyms, university facilities, and social media platforms. The study population includes recreationally active females aged 18-40 who engage in activities such as running or brisk walking and are willing to attend a single in-person session at the University of Ottawa's Motor Function Measurement Laboratory.

You may qualify if:

• Aged 18-40
• 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

You may not qualify if:

• Currently pregnant or have been pregnant in the past 6 months
• 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

Sponsors & Collaborators

• University of Ottawa: lead

Study Sites (1)

University of Ottawa - Lees Campus

Ottawa, Ontario, K1S 5S9, Canada

RECRUITING

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MeSH Terms

Conditions

Urinary Incontinence; Urinary Incontinence, Stress

Interventions

Water

Condition Hierarchy (Ancestors)

Urination Disorders; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Male Urogenital Diseases; Lower Urinary Tract Symptoms; Urological Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Hydroxides; Alkalies; Inorganic Chemicals; Anions; Ions; Electrolytes; Oxides; Oxygen Compounds

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Full Professor

Study Record Dates

• First Submitted: September 12, 2025
• First Posted: September 19, 2025
• Study Start: July 16, 2025
• Primary Completion: December 31, 2025
• Study Completion: April 30, 2026
• Last Updated: October 3, 2025

Record last verified: 2025-07

Locations

CA (1)