How many trials should be performed for the single-leg stance test?

Three trials on each leg, with the best time recorded. The first trial is often shorter than subsequent trials due to anxiety and unfamiliarity with the task. Using the best of 3 trials provides a more accurate estimate of true balance capability. Documenting both legs and both eyes-open and eyes-closed conditions (if feasible) provides the most complete balance profile.

How does the single-leg stance test compare to the Timed Up and Go?

Single-leg stance measures static balance — standing still on one leg without moving. The TUG measures dynamic mobility — transitioning from sit to stand, walking 3 meters, turning, and returning. Both assess different aspects of fall risk. Static balance impairment (poor single-leg stance) often predicts injurious falls, while dynamic mobility impairment (slow TUG) predicts fall frequency. Using both tests together provides a more complete balance risk profile than either alone.

What conditions cause abnormally low single-leg stance times?

Common causes include: age-related sensorimotor decline (most common in older adults); Parkinson's disease and other movement disorders; vestibular disorders (peripheral or central); peripheral neuropathy affecting proprioception; hip or knee pathology causing pain or weakness; ankle instability; cerebellar ataxia; prior stroke; severe deconditioning; and orthostatic hypotension causing dizziness in an upright position. Medication effects (sedatives, antihypertensives causing dizziness) should also be assessed in patients with unexplained balance impairment.

Is the single-leg stance test safe to perform in all older adults?

The test carries some fall risk in older adults with severe balance impairment. Safety precautions: always have an examiner adjacent ready to stabilize; ensure a wall, chair, or support surface is within immediate reach; perform on a stable non-slip surface; document any signs of pre-syncope (pallor, diaphoresis, dizziness). Contraindications include acute lower extremity fracture or post-operative restriction, severe orthostatic hypotension, and active delirium. Patients with very poor balance (unable to stand without support) should be assessed via tandem stance rather than single-leg stance.

How often should single-leg stance be reassessed for monitoring?

In physical therapy programs, reassessment every 4-6 weeks documents response to balance intervention. In primary care fall-risk screening, annual testing for adults 70+ is reasonable, with more frequent testing for those below the risk threshold who are actively exercising. After significant health changes — acute illness, fall, new neurological symptom, medication changes — reassessment is warranted even outside scheduled intervals.

Online Medical Tools — Single-Leg Stance

Printed on 9/4/2026

For informational purposes only. This is not medical advice.

Geriatrics

Single-Leg Stance

The Single-Leg Stance Test measures how long a person can stand on one leg without support. It is a practical bedside/outpatient balance screen used in older-adult assessment and rehabilitation to identify postural instability and track progress.

Formula: Result is the best unsupported single-leg stance duration in seconds.

Best single-leg stance time (seconds)

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How It Works

Position the Patient and Explain the Task

Have the patient stand on a firm, flat surface near a wall or rail for safety. The patient should be wearing their usual footwear (standardize footwear across serial assessments). Instruct the patient to stand on one leg — starting with their preferred/dominant leg — without holding onto anything or touching the raised leg to the standing leg. The non-weight-bearing foot can be raised to any comfortable height. Arms may be held at the sides or crossed over the chest but must not be used for balance or wall contact. Demonstrate the correct position and have the examiner stand adjacent for safety.

Time the Stance and Record Best Performance

Start timing when the non-weight-bearing foot leaves the floor. Stop timing when any of the following occur: the raised foot touches the floor; the raised foot touches or rests against the standing leg; the standing foot shifts or hops; arms reach for support; or 30-60 seconds is reached (maximum time). Perform 3 trials on each leg and record the best time for each. Repeat on the opposite leg. The stance time on the weaker leg is typically more clinically informative than the dominant leg result. Document whether timing was stopped by test failure or maximum time reached.

Interpret Against Age-Related Reference Ranges

Apply age-based thresholds: adults 60-69 should typically achieve above 20 seconds; adults 70-79 should typically achieve above 10 seconds; adults 80 and older should typically achieve above 5 seconds. In older adults aged 70 and above, a single-leg stance time below 5 seconds is associated with significantly elevated fall risk and should trigger comprehensive falls assessment. Below 10 seconds in adults 70+ warrants clinical attention. Serial measurements at 6-8 week intervals document response to balance training interventions, vestibular rehabilitation, or lower extremity strengthening programs.

Who Uses the Single-Leg Stance

Community Fall-Risk Screening in Primary Care

Primary care physicians, geriatricians, NPs

The single-leg stance test requires no equipment and takes under 2 minutes, making it ideal for annual fall-risk screening at primary care wellness visits for adults 65 and older. A stance time below 5 seconds in an older adult is a clinically meaningful risk flag that should trigger comprehensive falls assessment including medication review, vision screening, orthostatic hypotension assessment, and home safety evaluation. Combine with the Timed Up and Go Test for a more complete mobility screen at no additional cost or equipment.

Physical Therapy Balance Assessment and Progress Tracking

Physical therapists, rehabilitation specialists

Single-leg stance time is a standard balance outcome measure in physical therapy programs targeting fall prevention, vestibular rehabilitation, post-stroke balance recovery, and lower extremity strengthening. It sensitively tracks improvements in ankle proprioception, hip abductor strength, and vestibular function over 6-12 week intervention periods. A clinically meaningful improvement is generally considered to be 3 or more seconds on repeated testing. PT programs demonstrate 5-15 second improvements in single-leg stance time after 8-12 weeks of targeted balance training.

Parkinson's Disease and Vestibular Disorder Assessment

Neurologists, movement disorder specialists, vestibular PTs

Single-leg stance testing is particularly sensitive in Parkinson's disease, where postural instability and impaired ankle proprioception produce dramatically reduced single-leg stance times even in the early stages of the disease. Serial testing tracks disease progression and response to physical therapy or medication changes. In vestibular disorders, comparing stance time with eyes open versus eyes closed (Romberg augmentation) differentiates vestibular from proprioceptive balance impairment — reduced eyes-closed performance indicates vestibular dysfunction.

Post-Fracture Rehabilitation Milestone Assessment

Orthopaedic surgeons, rehabilitation medicine physicians, PTs

After hip fracture, ankle fracture, or lower extremity surgery, single-leg stance time on the affected limb documents rehabilitation progress and discharge readiness. The goal of achieving 10+ seconds on the affected side is a common rehabilitation milestone before clearance for unsupervised community ambulation. Single-leg stance ability also predicts the risk of contralateral hip fracture — patients who cannot stand on the non-fractured limb for 5 seconds have substantially higher risk of bilateral fracture.

Annual Wellness Visit Functional Monitoring

Geriatric primary care teams, nurse practitioners

Annual single-leg stance testing in adults 65 and older provides a trackable longitudinal measure of balance function that supplements subjective fall history and questionnaire-based screening. A decline of 3 or more seconds between annual measurements warrants investigation for new neurological or musculoskeletal pathology, medication review, and exercise referral. Documenting the absolute time and whether it was limited by failure or maximum time reached provides more clinical information than a binary pass/fail result.

Pro Tips

Always Test Both Legs and Compare Sides

Asymmetric single-leg stance times — for example, 15 seconds on the right and 5 seconds on the left — are as clinically significant as a low bilateral time. Asymmetric performance suggests a unilateral neurological deficit, prior lower extremity injury, or focal musculoskeletal problem on the weaker side. Always test both legs and document both results. In patients with Parkinson's disease, progressive asymmetry in single-leg stance correlates with unilateral disease lateralization.

Perform 3 Trials and Use the Best Value

Single-leg stance time improves across trials due to learning effects and initial anxiety reduction. The first trial is often significantly shorter than the second and third. Always perform 3 trials on each leg and record the best value. Using single-trial results underestimates true ability and produces lower apparent baseline values that will show spurious improvement at follow-up simply due to test familiarity. Some clinical protocols use the mean of trials 2 and 3 rather than the best of 3, but the best-of-3 approach is most clinically common.

Eyes-Open vs Eyes-Closed Testing Differentiates Balance Impairment Mechanisms

Testing with eyes open primarily relies on visual, vestibular, and proprioceptive inputs. Testing with eyes closed (eyes-closed single-leg stance) removes visual compensation and reveals the contribution of vestibular and proprioceptive systems to balance. A patient who performs well with eyes open but poorly with eyes closed (Romberg-positive) has a vestibular or proprioceptive deficit that relies on vision for compensation. This information guides physical therapy targeting — vestibular rehabilitation for vestibular deficits versus proprioceptive training and ankle strengthening for proprioceptive deficits.

Below 5 Seconds at Any Age Over 70 Warrants Comprehensive Assessment

While normative values vary by age, a single-leg stance time below 5 seconds in any adult over 70 is a clinically actionable finding regardless of the specific age-group norm. This threshold was used by Vellas et al. in studies demonstrating 2-3 fold increased injurious fall risk. Patients at this level should not be reassured or monitored without active intervention — they need immediate fall risk assessment, physical therapy referral, and home safety evaluation.

Standardize Footwear and Surface Across Serial Tests

Single-leg stance time varies significantly with footwear type (barefoot vs. sneakers vs. dress shoes), surface compliance (carpet vs. linoleum vs. foam pad), and room brightness. For serial monitoring to be interpretable, standardize all these factors at each assessment. Document the footwear worn, the surface used, and whether the test was performed with eyes open or closed. Unexpected changes in single-leg stance time at follow-up may reflect test administration differences rather than true clinical change.

Safety Precautions Are Non-Negotiable

Single-leg stance testing in older adults with known balance impairment carries fall risk. Always have an examiner standing immediately adjacent to the patient with hands ready to catch — not touching, but poised to stabilize. A parallel bar, countertop, or chair should be within immediate reaching distance. Never leave a patient unattended during the test. Stop the test immediately if the patient shows signs of pre-syncope (pallor, diaphoresis, dizziness complaints) or if their balance appears acutely compromised during the stance.

Interpret in the Context of What Stopped the Timer

Two patients who both achieve 5 seconds have different clinical pictures if one failed due to balance loss and the other was stopped because of pain. Document the reason for test termination: balance loss (foot touched floor, arms reached for support), maximum time reached, pain, or fatigue. A patient stopped by pain rather than balance loss may have better actual balance capability than the score suggests, and pain management may significantly improve their functional balance.

Use Tandem Stance as a Bridge Between Two-Legged and Single-Leg Tasks

For patients too impaired to attempt single-leg stance, tandem stance (one foot directly in front of the other, heel-to-toe) provides a bridge test of increasing balance difficulty. The progression: parallel stance → semi-tandem (feet offset at 45 degrees) → full tandem → single-leg stance represents a difficulty continuum. Using the level at which the patient first fails provides more nuanced balance profiling than single-leg stance alone and guides physical therapy programming at the appropriate level of difficulty.

Common Questions About Your Results

A single-leg stance of 4 seconds in an older adult (70+) is below the commonly cited 5-second risk threshold and warrants clinical action, but it is not an acute emergency in isolation. This finding should trigger: a comprehensive falls assessment including fall history in the past 12 months, medication review for medications contributing to balance impairment (anticholinergics, benzodiazepines, opioids, antihypertensives), vision and hearing screening, assessment for orthostatic hypotension, physical therapy referral for balance training, and home safety assessment. If the patient has also had a recent fall or reports near-falls, escalate the urgency of these referrals and consider same-day PT consultation if available.

A single-leg stance of 2 seconds in a patient with Parkinson's disease indicates significant postural instability that places them at very high risk for falls and injurious falls including hip fracture. This level of impairment warrants: urgent physical therapy referral for Parkinson's-specific balance training programs (LSVT BIG, Tai Chi for Parkinson's, Dance for PD); review of antiparkinsonian medications with the neurologist to assess whether motor fluctuations are contributing to balance impairment; home safety assessment and provision of ambulatory aids; formal fall-prevention counseling for the patient and caregivers; and consideration of fracture risk assessment (FRAX) given the high injury risk if falls occur.

Single-leg stance testing on the replaced hip limb is typically introduced 8-12 weeks post-operatively after clearance for full weight bearing and early strengthening. The initial target is 5-10 seconds on the replaced limb, progressing toward symmetry with the contralateral side over 3-6 months of rehabilitation. Testing should only be performed with surgeon clearance, appropriate physical therapy supervision, and on a stable surface with support available. Single-leg stance on the non-operated limb can be tested earlier to document unilateral balance function and plan bilateral rehabilitation goals.

A patient unable to attempt single-leg stance (0 seconds) has severe static balance impairment and is at the highest fall-risk level for this test. Document 0 seconds and the reason for inability (fear, immediate balance loss, pain, severe weakness). These patients need urgent physical therapy assessment, immediate fall-prevention measures (ambulatory aids, grab bars, bathroom safety equipment, avoidance of unsupported ambulation), and comprehensive medical evaluation for causes of severe balance impairment including cerebellar or vestibular pathology, severe peripheral neuropathy, or advanced Parkinson's disease.

Evidence-Based Methodology

Single-leg stance duration has longstanding use and associations with balance impairment and falls in older adults.

Clinical Content Trust

Last reviewed:: April 21, 2026
Guideline version:: General evidence framework v2026.04
Source set version:: Primary-source set v1

How to Interpret Your Result

Lower stance times indicate poorer static balance control and higher fall-risk signal.

When to Use This Tool

Use in outpatient geriatrics, rehab, and fall-risk screening where quick static-balance assessment is needed.

Limitations

Performance is influenced by footwear, instructions, pain, and neurologic/musculoskeletal comorbidity.

Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.

Sources

Changelog

April 21, 2026 · trust-baseline
Clinical trust metadata enabled for this tool page with structured review/version fields.

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Frequently Asked Questions

The Single-Leg Stance Test measures how long a person can stand on one leg without support, quantifying static balance — the ability to maintain a stable base of support in a challenging position. It reflects integration of vestibular, visual, and somatosensory inputs and the strength of hip abductors and ankle stabilizers. It is a quick, equipment-free balance assessment widely used in geriatrics, physical therapy, and fall-risk screening.

Reference ranges vary by age: adults 60-69 years typically achieve 20+ seconds; adults 70-79 should typically achieve 10+ seconds; adults 80+ should typically achieve 5+ seconds. In adults 70 and older, below 5 seconds is associated with significantly elevated fall risk. Below 10 seconds in adults 70-79 is below average and warrants clinical attention. These are approximate guidelines — always interpret in clinical context and use serial measurements for individual tracking.

Below 5 seconds in an older adult (70+) is the threshold most commonly associated with elevated fall risk in the literature, particularly for injurious falls. Vellas et al. demonstrated 2-3 fold higher injurious fall risk in older adults unable to maintain single-leg stance for 5 seconds. This finding should trigger comprehensive falls assessment, medication review, physical therapy referral, and home safety evaluation.

Yes. Eyes-closed single-leg stance testing removes visual compensation and reveals the contribution of vestibular and proprioceptive systems to balance. A patient who performs well with eyes open but poorly with eyes closed has a vestibular or proprioceptive deficit. This information guides physical therapy targeting: vestibular rehabilitation for vestibular deficits, proprioceptive training for proprioceptive deficits.

Yes. Single-leg stance time is responsive to balance training interventions. Significant improvements — typically 5-15 seconds — have been demonstrated in 8-12 week balance training programs including Tai Chi, progressive balance exercises, and vestibular rehabilitation. This makes it a useful outcome measure for physical therapy programs and fall-prevention exercise classes targeting older adults.

Online Medical Tools — Single-Leg Stance

Single-Leg Stance

How It Works

Position the Patient and Explain the Task

Time the Stance and Record Best Performance

Interpret Against Age-Related Reference Ranges

Who Uses the Single-Leg Stance

Community Fall-Risk Screening in Primary Care

Physical Therapy Balance Assessment and Progress Tracking

Parkinson's Disease and Vestibular Disorder Assessment

Post-Fracture Rehabilitation Milestone Assessment

Annual Wellness Visit Functional Monitoring

Pro Tips

Always Test Both Legs and Compare Sides

Perform 3 Trials and Use the Best Value

Eyes-Open vs Eyes-Closed Testing Differentiates Balance Impairment Mechanisms

Below 5 Seconds at Any Age Over 70 Warrants Comprehensive Assessment

Standardize Footwear and Surface Across Serial Tests

Safety Precautions Are Non-Negotiable

Interpret in the Context of What Stopped the Timer

Use Tandem Stance as a Bridge Between Two-Legged and Single-Leg Tasks

Common Questions About Your Results

Evidence-Based Methodology

Clinical Content Trust

How to Interpret Your Result

When to Use This Tool

Limitations

Sources

Changelog

Related Tools

Functional Reach Test

Berg Balance Scale

Tinetti POMA

4m Walking Speed

Further Reading

A Comprehensive Guide to Geriatric Medicine: Assessment Tools and Aging Health

Frequently Asked Questions