Why balance sometimes lags behind strength—and what two common assessments reveal about your steadiness.
By Michelle, PT, DPT, Cert DN, Board Certified Orthopedic Clinical Specialist — Total Knee Success Podcast (Episode 23)
“Balance returns layer by layer. Improvement is happening, even when progress feels quiet.”
You are learning how to trust your movement again, and that is a skill worth building.
Listener Acknowledgment
If you’ve noticed small hesitations during turns, uneven steps, or brief moments of wobbliness months after surgery, you’re in good company. Many people feel strong overall yet still experience these subtle shifts. This article explains why—and how balance assessments help make sense of it.
Moving Through Everyday Life—But Still Feeling a Little Unsure
Strength often returns earlier than balance. Pain decreases, walking becomes easier, but the deeper balance systems continue adjusting. Those “why did that feel off?” moments usually reflect sensory or coordination layers—not a problem with your knee.
Therapists use specific assessments to see which parts of your balance are still catching up. The two most common are:
- The Berg Balance Scale
- The Mini-BESTest
They measure different aspects of steadiness, giving a more complete picture of how you’re managing movement.
What You’ll Learn
Why unsteadiness can linger even as strength improves, what the Berg and Mini-BESTest actually measure, and which balance systems influence the small hesitations people often notice after a total knee replacement.
Why Wobbliness Happens Months After Surgery
Balance depends on many systems working at the same time:
- Sensation through the feet, ankle, and knee
- Coordination between muscle groups
- Vision
- Inner-ear (vestibular) input
- Reaction timing
- Confidence
- Strength
These systems recover at different rates. A slight mismatch in any one of them can create small hesitations that feel disproportionate to your overall progress.
The Berg Balance Scale: A Trusted Look at Quiet Steadiness
The Berg Balance Scale is one of the most widely used balance tools and examines 14 tasks that mirror everyday movements. It reflects:
- Standing up without using hands
- Maintaining steady standing and sitting
- Transferring between stable surfaces
- Standing with eyes open, then closed
- Standing with feet close together
- Reaching forward
- Picking up an item from the floor
- Turning to look behind you
- Turning a full circle
- Heel-to-toe stance
- Standing on one leg
These tasks showcase static balance—your ability to stay steady during quiet, controlled positions.
Where the Berg Is Less Helpful After Knee Replacement
While reliable, the Berg is not as sensitive to the dynamic challenges people commonly face after knee replacement, such as:
- Turning quickly
- Navigating uneven surfaces
- Speed changes in walking
- Recovering from small stumbles
- Managing shifts in vision or footing
Research by Chan and colleagues found that the Berg was the least responsive balance measure in individuals after knee replacement, especially when compared with the Mini-BESTest.
It’s not “wrong”—it simply measures a different part of balance, one that may already be fairly solid.
The Mini-BESTest: A Closer Look at Real-World Movement
The Mini-BESTest provides a more in-depth look at the parts of balance that influence daily confidence. It evaluates four major balance systems:
1. Anticipatory Control
This reflects how your body prepares for movement. Tasks include:
- Standing up without using hands
- Standing on toes
- Balancing on one leg
2. Reactive Control
This measures how quickly you respond when something unexpected happens. Small nudges from the therapist show:
- How well you catch yourself
- Whether you take an appropriate step
- How you handle slips or sudden shifts
3. Sensory Orientation
This shows how your balance adapts when sensory input changes, such as:
- Standing on firm vs. soft surfaces
- Standing with eyes open vs. closed
It highlights whether you rely heavily on vision or sensation, or if you can adapt well.
4. Dynamic Gait
These tasks reflect everyday movement challenges:
- Changing walking speeds
- Turning your head while walking
- Pivoting quickly
- Stepping over small obstacles
These are often the exact situations where people report feeling “just a little off.”
Why the Mini-BESTest Fits Knee Replacement Better
Studies consistently show that the Mini-BESTest and BESTest family are more sensitive to balance issues that appear after knee replacement. They detect the same challenges people describe: turning hesitations, uneven-surface difficulty, or adjustments during walking.
What Research Says About Ongoing Balance Changes
Evidence from your reference list reinforces common clinical patterns:
- Pain often improves faster than dynamic function (Orange and colleagues).
- Outcomes vary widely even with structured care (Minick and Capin; Capin and Minick).
- Conditions like diabetes influence functional improvements (Na and colleagues).
- Walking adherence affects mobility outcomes (Duong and colleagues).
- Prehab provides measurable early and long-term advantages (Gränicher and colleagues).
- Exercise remains safe and essential for long-term joint stability (Bricca and colleagues).
Across studies: mild wobbliness typically reflects balance system recalibration, not implant problems.
Wrap-Up
Small moments of unsteadiness are common. The Berg shows how well you manage quiet, controlled positions. The Mini-BESTest shows how you handle movement, turns, and changing environments.
Each balance system—anticipatory control, reactive stepping, sensory adaptation, and dynamic gait—can improve with guided practice and time.
Recommended Tools & Resources
If you want to explore related education topics, visit TotalKneeSuccess.com. These resources support learning and informed conversations with your care team.
Amazon Affiliate Notice: As an Amazon Associate, I earn from qualifying purchases. If you choose to purchase through a referenced link, I may receive a small commission at no additional cost to you.
Your Next Step
Pay attention to the situations where steadiness feels more challenging—turns, uneven ground, speed changes, or multitasking during walking. Share these moments with your surgeon or physical therapist. Identifying patterns helps them focus on the exact balance components that will support your confidence.
FAQ
Why do I feel strong but still unsteady?
Because balance and strength recover at different rates. Balance involves several systems that recalibrate slowly.
Does wobbliness mean something is wrong with my implant?
Most of the time, no. Wobbliness usually reflects balance system adjustments, not implant issues. Ask your surgeon about concerns specific to you.
Is one balance test better than the other?
They serve different purposes. The Berg captures static steadiness; the Mini-BESTest captures dynamic, real-world balance.
How long does it take for balance to feel normal again?
Findings vary. Many people improve gradually over months as sensory, strength, and coordination systems align.
Can older adults still improve balance?
Yes. Research shows targeted balance work helps people across age groups.
Disclaimers
This article is for educational purposes only and not a substitute for medical advice, diagnosis, or treatment. Always consult your surgeon, physical therapist, or qualified clinician for questions about your health. Do not delay seeking care because of something you read here.
References
Orange GM, Hince DA, Travers MJ, et al. Physical Function Following Total Knee Arthroplasty for Osteoarthritis: A Longitudinal Systematic Review With Meta-analysis. J Orthop Sports Phys Ther. 2025;55(1):1–XX.
Na A, Oppermann LM, Jupiter DC, et al. Diabetes Mellitus Blunts the Symptoms, Physical Function, and Health-Related Quality of Life Benefits of Total Knee Arthroplasty. J Orthop Sports Phys Ther. 2021;51(6):269–280.
Duong V, Dennis S, Ferreira ML, et al. Predictors of Adherence to a Step Count Intervention Following Total Knee Replacement. J Orthop Sports Phys Ther. 2022;52(9):620–630.
Gränicher P, Mulder L, Lenssen T, et al. Prehabilitation Improves Knee Functioning Before and Within the First Year After Total Knee Arthroplasty. J Orthop Sports Phys Ther. 2022;52(11):709–725.
Minick KI, Hunter SJ, Capin JJ, et al. Improved Outcomes Following Care Guideline Implementation. J Orthop Sports Phys Ther. 2023;53(3):143–150.
Capin JJ, Minick KI, Stevens-Lapsley JE, et al. Variation in Outcomes and Number of Visits Following Care Guideline Implementation. J Orthop Sports Phys Ther. 2023;53(3):151–160.
Dandis M, et al. Latent Class Analysis to Predict Outcomes of Early High-Intensity Physical Therapy After Total Knee Arthroplasty. J Orthop Sports Phys Ther. 2021;51(7):362–371.
Goff AJ, Donaldson A, de Oliveira Silva D, et al. Education Priorities of Physical Therapists for People With Knee Osteoarthritis. J Orthop Sports Phys Ther. 2022;52(9):607–619.
Bricca A, Roos EM, et al. Exercise Therapy “Wears Down” My Knee Joint: Myth or Reality? J Orthop Sports Phys Ther. 2025;55(7):463–476.