Effects of Exercise Training on Pelvic Floor Symptoms and Function in Adults With Constipation

Not Applicable

Completed

Conditions: Constipation

Interventions: Other: multimodal exercise training

Registration Number: NCT04661202

Lead Sponsor: National Cheng Kung University

Brief Summary: Constipation is a common problem in the general population. Defecation disorders caused by abnormal contraction or insufficient relaxation of the pelvic floor muscles during defecation may be one of the most possible causes of constipation. Although constipation is not life-threatening, it may have a significant impact on the quality of life. Aerobic exercise has been shown to improve symptoms of constipation in adults with constipation. However, there is no research investigating the effects of a multimodal exercise training on pelvic floor symptoms and pelvic floor muscle function in this population and only few studies have evaluated the pelvic floor muscle function using objective assessment tools among this population. The aim of the study is to investigate the effect of a multimodal exercise training program on constipation symptoms and pelvic floor muscle function in adults with constipation. The investigator will conduct a randomized controlled trial to evaluate the effectiveness of exercise training for adults with constipation. This study hypothesizes that (1) a multimodal exercise training can improve pelvic floor symptoms and function in adults with constipation, and (2) the improvement in exercise training group will be higher than that in control group.

Detailed Description: This is a randomized controlled trial. Adults with constipation will be recruited and randomly assigned to either the intervention group or the control group. The intervention group will receive 16 sessions of therapist-supervised, combined resistance (including pelvic floor muscle training) and aerobic exercise training twice weekly for 8 weeks. The control group will receive usual care. All participants will be assessed at baseline and post-intervention. The primary outcome measure is the severity of the patient's self-reported constipation symptoms measured using the Patient Assessment of Constipation Symptoms Questionnaire (PACSYM). The secondary outcomes are pelvic floor muscle function assessed through the Pelvic Floor Muscle Coordination Scale (PFMCS), digital rectal examination, and anorectal manometry; quality of life measured by the Patient Assessment of Constipation Quality of Life Questionnaire (PACQOL); and physical activity levels measured using the International Physical Activity Questionnaire (IPAQ). Intention-to-treat analysis will be performed to preserve the sample size and original randomization. Mann-Whitneyand Chi-square testsest will be used for continuota and categorical data to compare the baseline characteristics between the two groups. Wilcoxon signed-rank test and the Mann-Whitney U test will be used for intragroup and intergroup comparison of outcome variables. The p-value of \< 0.05 will be considered statistically significant.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 27

Inclusion Criteria

Aged between 20 years and 64 years
Participants who fulfill the Rome IV criteria for constipation which include two or more of the following: a) straining > 25% of defecations; b) lumpy or hard stools > 25% of defecations; c) sensation of incomplete evacuation > 25% of defecations; d) sensation of anorectal obstruction/blockage > 25% of defecations; e) manual maneuvers to facilitate > 25% of defecations; f) < 3 spontaneous bowel movements per week
Participants who have sufficient language skills to participate

Exclusion Criteria

Participants who have received exercise or pelvic floor muscle training under supervision in the past 12 months
Participants with previous abdominal surgery, anorectal trauma or surgery, or previous diagnosis of neuropathy or anal sphincter dysfunction
Presence of malignancies, severe cardiovascular disease or other severe physical/psychiatric impairments that prevent participation in the study
Pregnant or within 12 months postpartum

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Exercise training group	multimodal exercise training	* Aerobic exercise * Resistance exercise (including pelvic floor muscle training with biofeedback) * Stretching exercise * Home exercise

Primary Outcome Measures

Name	Time	Method
Constipation Symptom-Time Spent During Defecation	absolute values at 8 weeks	A Seven Day Bowel Diary includes items regarding time spent during defecation.
Severity of Constipation Symptoms	absolute values at 8 weeks	The Patient Assessment of Constipation Symptoms questionnaire will be used to assess the severity of constipation symptoms. This questionnaire includes a total of 12 items in 3 subscales: abdominal (4 items), rectal (3 items), and stool (5 items). Participant will be asked to rank the symptoms on a five-point Likert scale, ranging from 0 (absent) to 4 (very severe). The total score ranges from 0 to 48 which will be divided by the actual number of items answered. The higher score indicates the greater severity of constipation symptoms.
Constipation Symptoms	absolute values at 8 weeks	A Seven Day Bowel Diary includes items regarding the stool frequency, presence of incontinence, excessive straining, manual maneuver, or pain during defecation, and the use of laxatives.
Constipation Symptom-Stool Consistency	absolute values at 8 weeks	A Seven Day Bowel Diary includes the item regarding stool consistency. The Bristol Stool Form Scale describing the shapes and types of stools is used to evaluate stool consistency. This scale assigns a number (1-7) with 1 indicating hardest to 7 indicating loosest, to classify human feces based on its shape and and how formed or loose it is.

Secondary Outcome Measures

Name	Time	Method
The Pelvic Floor Muscle Coordination Measured by the Pelvic Floor Muscle Coordination Scale	absolute values at 8 weeks	The Pelvic Floor Muscle Coordination Scale including 5 items, respiration, pelvic floor muscle contraction, extrapelvic muscle activation, pelvic floor muscle expansion, and cough will be used to evaluate pelvic floor muscle coordination. All will be evaluated by observation. The total score ranges from 0 to 10 and a higher score indicates the poorer pelvic floor muscle coordination.
Constipation Quality of Life	absolute values at 8 weeks	Patient Assessment of Constipation Quality of Life Questionnaire will be used to evaluate the quality of life in constipation patients. This questionnaire includes a total of 28 items in 4 subscales: worries and concerns (11 items), physical discomfort (4 items), psychosocial discomfort (8 items), and satisfaction (5 items). Participants will be asked to rank how constipation affects their quality of life on a five-point Likert scale, ranging from 0 to 4. A higher score indicates greater impact on quality of life.
The Pelvic Floor Muscle Strength Will be Measured by Digital Rectal Examination.	absolute values at 8 weeks	Resting tone, maximal voluntary contraction (MVC) of external anal sphincter and puborectalis, voluntary relaxation, and three components of defecation attempts (push effort, anal relaxation, and perineal descent) will be measured. Resting pressure was scored as "0=decreased", "1=normal", or "2=increased". Maximal voluntary contraction of external anal sphincter and puborectalis were scored separately for each muscle based on the International Continence Society scale criteria as "0=absent", "1=weak", "2=moderate", "3=strong". Voluntary relaxation was assessed after MVCs and scored as "0=absent", "1=partial", or "2=complete". Push effort was scored as "0=weak", "1=normal", or "2=excessive", anal relaxation was scored as "0=impaired", "1=normal", or "2=paradoxical contraction", and perineal descent was scored as "0=absent", "1=normal", or "2=excessive".
The Pelvic Floor Muscle Function Will be Measured Using Anorectal Manometry.	absolute values at 8 weeks	Participants will be asked to relax for 10 seconds, squeeze 3 times by holding 5 seconds with 5 seconds of rest in between, and squeeze by holding the contraction for 30 seconds. Anorectal pressure will be recorded in unit of millimeter of mercury (mmHg).
The Pelvic Floor Muscle Endurance Will be Measured Using Anorectal Manometry and Stopwatch.	absolute values at 8 weeks	Participants will be asked to voluntarily squeeze their pelvic floor muscles by holding the contraction for 30 seconds. Anorectal squeeze pressure is measured using an anorectal manometry. The pelvic floor muscle endurance is recorded as the time (seconds) holding at \>50% of maximal voluntary contraction (squeeze pressure) in 30 seconds.
Physical Activity Levels	absolute values at 8 weeks	The International Physical Activity Questionnaire will be used to measure participants' physical activity levels. This questionnaire includes seven questions on different physical activity levels of duration and frequency and then calculated in metabolic equivalent-minutes/week. A higher score indicates a greater physical activity levels.
Adherence	absolute values at 8 weeks	Participants in intervention group will be asked to record the number of completed home exercises (pelvic floor muscle training and walking) in the exercise diary. Adherence will be calculated separately for pelvic floor muscle training and walking as the days of home exercises completed over 56 days.