Why Patients Wear Leg Braces After Stroke
Patients wear leg braces (ankle-foot orthoses or AFOs) after stroke primarily to compensate for ankle instability and dorsiflexor weakness (foot drop), which directly improves walking speed, balance, safety, and overall mobility. 1
Primary Indications
The most common reason for prescribing leg braces after stroke is foot drop - the inability to lift the front part of the foot during walking due to weakness of the ankle dorsiflexor muscles. This creates:
- Tripping hazards during the swing phase of gait
- Ankle instability during standing and walking
- Compensatory gait patterns that reduce efficiency and increase fall risk
AFOs should be used for ankle instability or dorsiflexor weakness (Class I, Level B recommendation). 1
Specific Benefits Demonstrated
Meta-analyses show that AFOs provide immediate improvements in:
- Walking speed and distance - patients walk faster and farther 1, 2
- Step and stride length - more normal gait pattern 1, 2
- Balance and weight distribution - improved stability in standing 1
- Ankle and knee kinematics - better joint positioning during walking 1, 2
- Energy cost - more efficient walking requiring less effort 1
- Gait stability - reduced variability in step patterns 3
A 2021 meta-analysis of 434 stroke patients found significant improvements in walking speed (SMD 0.50), cadence, step length, stride length, and functional ambulation scores when wearing AFOs. 2 The most dramatic improvement was in functional ambulation category scores. 2
Clinical Decision-Making
The key predictor for needing an AFO at discharge is paralyzed ankle dorsiflexor muscle strength in the acute phase. 4 Approximately 40-49% of stroke patients discharged from rehabilitation use AFOs. 5, 4
The 2025 VA/DoD guidelines note that for patients with foot drop, either functional electrical stimulation or traditional ankle-foot orthoses can be offered to improve gait speed, as both are equally effective. 6 This gives clinicians flexibility based on patient preference and tolerance.
Important Nuances
AFOs work while being worn - the benefits are immediate but do not necessarily translate to improved walking without the device. 1 One small trial found that dynamic hinged AFOs improved function but created some dependence, whereas standard AFO users performed better after 3 months when walking without any orthosis. 1
Compliance is critical. The brace must fit correctly and comfortably for patients to wear it regularly. 1 Patient willingness to wear an AFO should be assessed, as the device only helps when actually used.
Common Pitfalls to Avoid
- Don't delay prescribing an AFO waiting for "normal" gait to return - patients prefer walking safely with a device over delaying mobility 1
- Ensure proper fitting - poorly fitted braces won't be worn and can cause skin breakdown
- Don't assume AFOs reduce cognitive-motor interference - while they improve gait parameters, they don't protect against dual-task costs (walking while doing mental tasks) 7
- Consider the type of AFO - articulated (hinged) AFOs may improve propulsion symmetry during complex tasks like obstacle crossing 8
Bottom Line
Leg braces after stroke are prescribed to immediately compensate for motor deficits (primarily foot drop and ankle instability), allowing safer and more efficient walking while rehabilitation continues. They improve walking speed, balance, and reduce fall risk - all critical for maintaining independence and quality of life after stroke.