Clear answer
Do not automatically squeeze as hard as possible. Use enough effort to create the intended closing and inward lift while breathing normally, limiting unnecessary bracing, and releasing completely. The appropriate effort depends on whether you are learning control, training strength, sustaining endurance, practising a quick response, or coordinating with movement.
A maximal effort can be useful in some assessed strength programmes, but it is not the default for every repetition or every person. If more effort changes the direction, shortens release, causes pain, or recruits the whole body, it is too much for that task.
Effort is not the same as correctness
A contraction can feel intense because you hold your breath, brace the abdomen, squeeze the buttocks, or press downward. None of those sensations proves that the pelvic floor is producing a better inward contraction. Conversely, a subtle effort can be correct and useful when learning awareness or timing.
The ICS assessment terminology separates strength from endurance, power, relaxation, and coordination. One “hardness” scale cannot represent all those qualities.
Match effort to the purpose
Awareness and motor control
Use a gentle or moderate attempt that makes the difference between rest and contraction clear. The goal is direction and repeatability, not fatigue. If a light contraction is hard to find, repeatedly maximizing may make substitution worse rather than teach control.
Strength practice
Strength-focused work may use relatively high voluntary effort after correct technique is established. The repetition should still preserve breathing and complete release. End the set when inward lift or force clearly falls, not when every possible repetition has been forced out.
Endurance practice
An endurance contraction is often submaximal so it can be sustained without fading into a brace. Choose an effort that remains consistent from beginning to end. If the final seconds are only breath-holding or buttock tension, the target was too ambitious.
Quick-response practice
Quick contractions prioritize prompt activation and release. A maximal clench can slow the cycle or leave residual tension. Use enough effort to make each pulse distinct, then return fully to rest.
Coordination with activity
The effort needed before a light cough is not necessarily the effort needed for a heavier task. Functional practice should scale to demand and end when the demand ends. Constant high effort is not functional coordination.
Relaxation-focused goals
For pain, nonrelaxation, or emptying difficulty, contraction effort may need to stay low or be omitted. Follow clinician guidance. More force is not a neutral experiment in a symptomatic pelvic floor.
A practical effort-selection check
Start lower than your presumed maximum and gradually increase only while all four markers remain:
- Direction: closing and inward lift, not bearing down.
- Breathing: no forced breath-hold or rigid rib cage.
- Selectivity: nearby muscles do not become the main action.
- Release: the effort ends completely before another repetition.
The useful effort ceiling is the last level at which those markers remain. This is a self-guided boundary, not a clinical strength test.
Why percentages are only coaching language
An app may describe 25%, 50%, or 75% effort. Without a measurement device and assessment, these are perceived-effort cues, not verified percentages of muscle force. Two people’s “50%” cannot be compared, and your own estimate can change with fatigue, position, pain, and attention.
Use percentage language to distinguish gentle, moderate, and stronger intent—not as a precise physiological measurement or a score to maximize.
Signs the effort is too high
Reduce effort or stop if:
- the perineum pushes downward;
- breathing stops despite attempts to continue it;
- the abdomen, buttocks, or thighs dominate;
- the contraction becomes shaky, painful, or cramping;
- the release is delayed or absent;
- pressure, heaviness, urgency, or leakage worsens;
- urination or bowel emptying feels more difficult afterward.
If a lower effort remains painful or unclear, do not solve the problem by trying harder.
Progression is not always more force
Progress can mean better consistency, clearer release, easier breathing, improved timing, a more relevant position, or the same task with fewer symptoms. Increasing effort is only one option. Change one variable at a time so the response is interpretable.
Bø and colleagues describe specificity and progression in pelvic-floor exercise science. That supports planned overload after control, not an instruction to make every session maximal.
Evidence boundaries
The International Consultation on Incontinence describes PFMT as potentially training different qualities. NICE recommends tailoring PFMT to ability, discomfort, needs, and goals in the population covered. These sources do not establish one universal perceived-effort percentage.
NIDDK’s public guidance emphasizes finding, holding, and fully relaxing the muscles. It does not prove that harder squeezing produces faster or better outcomes.
Effort examples without a universal percentage
A technique session might use the smallest effort that makes direction clear. A strength block may use a challenging contraction for fewer high-quality repetitions. An endurance block may deliberately begin lower so the effort can be maintained. A quick-response block may use moderate pulses so every release remains distinct.
These examples describe relationships, not a programme. If your “moderate” effort causes pain or lingering tension, it is not moderate for your current context. If a strong contraction is comfortable but cannot be reproduced, it may be a test rather than a trainable dose.
Reassess perceived effort over time
Do not assume a cue keeps the same meaning forever. Fatigue can make the same intended effort produce less movement, while improved control can make a lower perceived effort feel clearer. Re-rate effort at the start of a session and keep the quality ceiling in place.
After a break, illness, procedure, or symptom change, return to a lower effort until the response is known. A previous maximum is historical information, not a current requirement.
Use the same position and cue when comparing effort across sessions. Otherwise a change in posture or attention can feel like a strength change. Review a small set rather than one exceptional repetition, and include how quickly a complete release returns.
Safety and scope limits
This guide cannot measure force or determine whether weakness is present. Pain, persistent tightness, urinary or bowel emptying difficulty, pregnancy complications, recent pelvic surgery, neurological symptoms, or a prescribed programme need individualized guidance.
Stop an exercise that causes pain or worsening symptoms. Seek urgent care for sudden inability to urinate or new saddle-area numbness with acute bladder, bowel, or leg changes.
Related next steps
Use effort levels for different training qualities for a goal-based comparison. Review correct Kegel technique and signs of too much training before progressing.
Effort can vary from day to day. Use the current quality ceiling rather than trying to reproduce a remembered maximum when you are tired, unwell, sore, or returning after a break.
Sources
- Bø K, Berghmans B, Mørkved S, Van Kampen M, editors. Evidence-Based Physical Therapy for the Pelvic Floor. 3rd edition. Elsevier; 2023. Chapter 6. Official publisher record.
- Frawley H, Shelly B, Morin M, et al. “An International Continence Society report on the terminology for pelvic floor muscle assessment.” Neurourology and Urodynamics. 2021;40(5):1217–1260. Official ICS report.
- Cardozo L, Rovner E, Wagg A, Wein A, Abrams P, editors. Incontinence. 7th edition. ICI–ICS; 2023. Chapter 8. Official ICS edition.
- National Institute for Health and Care Excellence. Pelvic floor dysfunction: prevention and non-surgical management. NICE guideline NG210. NICE recommendations.
- National Institute of Diabetes and Digestive and Kidney Diseases. “Kegel Exercises.” NIDDK guidance.