GLP-1 medications such as semaglutide and tirzepatide have helped many people manage diabetes and achieve meaningful weight loss. However, they may also cause digestive side effects including constipation.
If you are taking a GLP-1 medication and suddenly find yourself straining, feeling incompletely emptied, or spending much longer on the toilet, medication-related changes may not be the only factor. Your pelvic floor muscles can also influence how easily you have a bowel movement.
Why Can GLP-1 Medications Cause Constipation?
GLP-1 medications affect digestion in several ways. They may slow the movement of food through the digestive system, reduce appetite, and cause you to eat or drink less than usual. Together, these changes can contribute to harder or less frequent bowel movements. Constipation is listed as a common adverse effect of GLP-1 medications.
Medication may slow the stool’s journey through the digestive tract, but the pelvic floor still has to relax and coordinate correctly for the stool to leave the body.
What Does the Pelvic Floor Have to Do With Constipation?
The pelvic floor is a group of muscles that supports the bladder, bowel, and reproductive organs. These muscles should lengthen and relax when you have a bowel movement.
For some people, the muscles tighten instead of relaxing. Others may struggle to coordinate their breathing, abdominal pressure, and pelvic floor movement. This is sometimes called pelvic floor dyssynergia or an outlet dysfunction.
Possible signs include:
- Straining frequently
- Feeling that stool is stuck near the rectum
- Feeling incompletely emptied
- Needing to change positions repeatedly
- Using your fingers to assist with emptying
- Having pelvic, rectal, or tailbone pain
- Sitting on the toilet for a long time
- Passing small amounts despite feeling a strong urge
When a GLP-1 medication makes stool harder or bowel movements less frequent, an existing coordination problem may become much more noticeable.
Can Pelvic Floor Therapy Treat GLP-1 Constipation?
Pelvic floor therapy cannot change the medication’s effect on digestion or directly treat slow movement through the intestines. However, it may improve your ability to empty the bowel when pelvic floor tension, poor coordination, or ineffective toileting mechanics are contributing to the problem.
Research supports pelvic floor retraining for constipation caused by pelvic floor dyssynergia, although these treatments are not designed to correct slow-transit constipation alone.
This distinction is important: constipation may involve slow digestion, pelvic floor dysfunction, or a combination of both. A pelvic floor therapist can help identify whether the muscles around the rectum are part of the problem.
What Does Pelvic Floor Therapy for Constipation Include?
Treatment is personalized, but it may include:
Pelvic Floor Coordination Training
Your therapist can teach you how to relax and lengthen the pelvic floor instead of tightening it while attempting to empty your bowels. This may include breathing exercises, movement training, or biofeedback.
Better Toileting Mechanics
Small changes in positioning can make bowel movements easier. Your therapist may recommend placing your feet on a stool, leaning forward, relaxing your abdomen, and using controlled exhalation instead of holding your breath and pushing forcefully.
Diaphragmatic Breathing
The diaphragm, abdominal wall, and pelvic floor work together to manage pressure. Diaphragmatic breathing may help reduce unnecessary pelvic floor tension and improve coordination during a bowel movement.
Abdominal and Soft-Tissue Techniques
When appropriate, a therapist may use gentle abdominal or soft-tissue techniques to address tension and support comfortable movement. You may also learn safe self-massage techniques for home.
Mobility and Exercise
Regular movement can support bowel function. Your therapist may recommend walking, trunk rotation, hip mobility, or other exercises based on your symptoms and overall health.
Individualized Habit Education
Your therapist can help you recognize bowel urges, avoid prolonged straining, and develop a consistent routine. They may also coordinate with your prescribing provider, gastroenterologist, or dietitian when medication management, hydration, or nutrition needs to be addressed.
What Can You Try at Home?
These general strategies may help:
- Drink fluids consistently, unless a healthcare provider has restricted your intake.
- Increase fiber gradually rather than making a sudden large change.
- Include regular movement, such as walking, when medically appropriate.
- Use a footstool to bring your knees slightly above your hips.
- Avoid holding your breath or straining aggressively.
- Respond to the urge to have a bowel movement when possible.
- Speak with your prescriber before starting laxatives, supplements, or changing your medication.
Fiber is not always the complete answer. Adding large amounts of fiber without enough fluid or when stool is already difficult to pass may increase bloating and discomfort. Your healthcare team can help determine which approach is appropriate for you.
When Should You Contact a Medical Provider?
Contact your prescribing provider if constipation began after starting a GLP-1 medication, worsened after a dose increase, or is not improving with your usual strategies. Do not stop or adjust the medication without discussing it with the prescribing provider.
Seek urgent medical attention for symptoms such as:
- Severe or worsening abdominal pain
- Persistent vomiting
- Significant abdominal swelling
- Inability to pass stool or gas
- Blood in the stool
- Fever, fainting, or signs of dehydration
The Bottom Line
GLP-1 constipation is not always just about needing more fiber. Slower digestion, reduced food or fluid intake, and difficulty relaxing the pelvic floor can all contribute.
Pelvic floor therapy may be especially helpful if you are straining, feeling incompletely emptied, or sensing that stool reaches the rectum but is difficult to pass. By improving breathing, positioning, pelvic floor relaxation, and bowel-emptying coordination, therapy can make bowel movements more comfortable and efficient.
If constipation is affecting your daily life while taking a GLP-1 medication, speak with your prescribing provider and consider an evaluation with a pelvic floor physical therapist.
Looking to optimize your well being with pelvic floor physical therapy? Reach out to us at Pelvic Health Center in Madison, NJ to set up an evaluation and treatment! Feel free to call us at 908-443-9880 or email us at [email protected]