Kegel exercises and biofeedback after low anterior resection

Kegel exercises and biofeedback after surgery

After low anterior resection for rectal cancer, many patients experience continence difficulties — involuntary leaks, fecal urgency or inability to distinguish gas from stool. Kegel exercises and biofeedback are scientifically proven methods that can significantly improve sphincter control and quality of life.

Why continence is affected after surgery

Anatomy and function

Fecal continence depends on several factors:

Internal anal sphincter — smooth muscle, involuntarily controlled (resting tone)
External anal sphincter — striated muscle, voluntarily controlled (active contraction)
Pelvic floor muscles — support pelvic organs and contribute to continence
Rectum — natural reservoir storing stool
Pelvic nerves — transmit fullness sensation and coordinate reflexes

What happens after low anterior resection

The rectum is removed — the natural reservoir is lost (the new reservoir — the neorectum — is smaller and less compliant)
Nerves can be injured — surgical dissection close to the pelvic nerves
Radiotherapy — may affect tissue elasticity and nerve function
Temporary ileostomy — the sphincter has not been used for months and has deconditioned

All these changes contribute to LARS syndrome (Low Anterior Resection Syndrome), which affects up to 80% of patients. Assess your symptoms with the LARS calculator.

What Kegel exercises are

Kegel exercises consist of voluntary contraction and relaxation of the pelvic floor muscles. They were originally described by Dr. Arnold Kegel in the 1940s for urinary incontinence, but are equally effective for fecal continence.

Identifying the correct muscles

Before starting the exercises, you must identify the right muscles:

Method 1 — Stopping urine flow

During urination, try to stop the flow midway
The muscles you contract are the pelvic floor muscles
Caution: use this method only for identification, NOT as a regular exercise

Method 2 — Anal contraction

Imagine that you are trying to hold in gas
Squeeze the area around the anus without contracting your buttocks, abdomen or thighs
If you feel an “upward” movement inside the pelvis, you’ve found the correct muscles

Method 3 — Mirror

Sit on a mirror and contract
You should see the anus tightening and pulling slightly upward
If you only see the buttocks contracting, you are not using the correct muscles

The Kegel exercise program

Level 1 — Weeks 1-2 (Initiation)

Quick contractions:

Contract the pelvic floor muscles quickly, then relax immediately
10 reps, 3 times a day
Goal: activating and becoming aware of the muscles

Sustained contractions:

Contract and hold for 3 seconds, then relax for 6 seconds
5 reps, 3 times a day
Breathe normally during the exercise — don’t hold your breath

Level 2 — Weeks 3-6 (Progression)

Sustained contractions:

Contract and hold for 5 seconds, relax for 10 seconds
10 reps, 3 times a day

Quick contractions:

15 reps, 3 times a day

“The Knack” (preventive contraction):

Strongly contract the pelvic floor muscles before coughing, sneezing, lifting an object, or any action that increases abdominal pressure
This technique prevents leaks during effort

Level 3 — After week 6 (Maintenance)

Sustained contractions:

Contract and hold for 10 seconds, relax for 10 seconds
10-15 reps, 3 times a day

Quick contractions:

20 reps, 3 times a day

Functional exercises:

Practice contraction in different positions: lying, sitting, standing, walking
Integrate “The Knack” into daily activities

Common mistakes

What NOT to do

Do not contract buttocks, abdomen or thighs — isolate just the pelvic floor
Do not hold your breath — breathe normally throughout the exercise
Do not overdo it — overworking the muscle can lead to fatigue and worsening symptoms
Do not get discouraged — results appear after 6-8 weeks of consistent exercise
Do not exercise only lying down — progress to functional positions (sitting, standing)

Signs you are doing it wrong

You feel pain during contraction
Buttocks or thighs visibly move
You hold your breath involuntarily
You feel downward pressure instead of an upward lift

What biofeedback is

Biofeedback is a retraining technique that uses electronic sensors to show you in real time the activity of your pelvic floor muscles. It is like a “personal trainer” for muscles you cannot see.

How it works

Sensors — a small anal probe with surface electrodes is inserted into the anal canal
Monitor — muscle activity is displayed on a screen as graphs or interactive games
Visual feedback — you see exactly when and how strongly you contract
Guided training — the therapist teaches you to contract the right muscles at the right intensity

Types of biofeedback

EMG (electromyographic) biofeedback

Measures the electrical activity of muscles
Most commonly used
Displays contraction intensity on a graph

Manometric biofeedback

Measures the pressure generated by muscle contraction
Provides information about sphincter strength

Balloon biofeedback

A small balloon inflated in the rectum simulates the presence of stool
Trains the urgency sensation and the retention reflex
Particularly useful for patients with fecal urgency

What a session involves

Duration: 30-45 minutes
Frequency: weekly or twice weekly
Number of sessions: 6-12 sessions (sometimes more)
Location: specialized physiotherapy office or colorectal surgery clinic
Painless: the procedure is painless and non-invasive

Effectiveness — what studies show

Proven results

60-80% of patients report improved continence after biofeedback
Reduction of incontinence episodes by 50-75% on average
Improvement in quality of life — studies show significant increases in quality-of-life scores
Outcomes are better when biofeedback is combined with home Kegel exercises

Factors that influence outcomes

Patient motivation — consistent exercises at home are essential
Timing of starting — ideally before stoma closure, continued afterward
Severity of nerve injury — extensive nerve damage responds more slowly
Radiotherapy — irradiated patients may have more modest results
Age — younger patients usually respond better

When to start

Ideally — before stoma closure

If you have a temporary ileostomy, start Kegel exercises 4-6 weeks before stoma closure. This way the pelvic floor muscles will already be trained when bowel transit is restored.

After stoma closure

If you didn’t exercise beforehand, it’s not too late. Start immediately after stoma closure, with easy exercises (Level 1).

Biofeedback

Usually recommended 2-3 months after stoma closure, if Kegel exercises alone have not produced the desired improvement.

Other complementary methods

Posterior tibial nerve stimulation (PTNS)

Electrical stimulation of the tibial nerve (at the ankle) that influences pelvic nerves
30-minute sessions, weekly, 12 sessions
Promising results, especially combined with biofeedback

Transanal irrigation (TAI)

Using a system to wash the colon through the anus
Not an exercise, but can be a practical solution for patients with severe incontinence
Allows “scheduled emptying” of the colon and reduction of accidents

Behavioral training

Toilet scheduling — going at fixed hours, regardless of urgency sensation
Delay techniques — gradually learning to postpone defecation
Diet and medication — loperamide, psyllium — help form consistent stool

Recommended daily program

Time	Exercise	Duration
Morning (waking up)	10 sustained contractions + 15 quick	5 minutes
Lunch	10 sustained contractions + 15 quick	5 minutes
Evening (before bed)	10 sustained contractions + 15 quick	5 minutes
Throughout the day	”The Knack” before effort	When needed

Total time: about 15-20 minutes per day

Useful apps

There are free phone apps that can remind you to do exercises and guide you through sessions:

Kegel Trainer — simple timer for contractions
Pelvic Floor Exercises — program structured by levels
Set phone alarms as reminders 3 times a day

When to see a specialist

If you cannot identify the correct muscles
If symptoms do not improve after 8 weeks of consistent exercise
If incontinence worsens
If you have pain during exercises

A pelvic floor physiotherapist can guide you and recommend biofeedback if needed.

This article is for informational purposes only and does not replace medical consultation. Discuss with your doctor about the continence recovery program appropriate for you.