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Single-Leg Stance on Unstable Surface

Draftbalance88%beginner⬤ moderate evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
standing on one leg on an unstable surface (foam pad, BOSU, or Airex), soft knee, level hip, gaze fixed at eye level, arms ready to assist balance
End
sustained single-leg balance on the unstable surface maintained through continuous ankle micro-corrections (progressed with eyes closed, perturbations, or dual-task)
Range of Motion
isometric single-leg hold — minimal joint excursion; small continuous ankle/hip sway corrections about a centered stance

How to Perform

Balance on one leg on an unstable surface (foam pad, BOSU, Airex). Progress with eyes closed, perturbations, or dual-task.

Watch on YouTube↗

Opens a YouTube search for “Single-Leg Stance on Unstable Surface”

Equipment:foam padbosu
Starting position: standing

Coaching Cues

  1. 1

    Soft knee, quiet hip — micro-corrections come from the ankle

    (verbal)
  2. 2

    Anchor the gaze on a point at eye level

    (verbal)
  3. 3

    Press the big toe gently into the surface

    (verbal)
  4. 4

    Tree rooted to the ground — sway, but stay centered

    (visual)

Evidence-Based Dosing & EMG Data

Recommended Dosing

3×30–60 s per leg, daily.

EMG Activation Data

Unstable-surface training improves balance ES=0.52 [Dipietro 2019].

Muscles Involved (6)

Primary Movers

Soleus
Gastrocnemius
Gluteus Medius— Pelvic stability

Secondary Movers

Tibialis Anterior
Peroneus Longus (Fibularis Longus)

Stabilizers

Peroneus Brevis (Fibularis Brevis)

Easier Variations ↓

1

Firm-Surface Single-Leg Stance

Start on stable ground.

Harder Variations ↑

1

Eyes Closed

Remove visual feedback.

2

Perturbations

Add external perturbations.

3

Dual-Task

Add a cognitive or motor second task.

Target Movements (4)

Ankle DorsiflexionTalocrural Joint
Ankle PlantarflexionTalocrural Joint
Foot InversionSubtalar Joint
Foot EversionSubtalar Joint

Why This Exercise Matters

Everyday activities this exercise helps you do — essential means it directly trains the capacity the task needs:

Single-Leg BalanceessentialWalkingStair Climbing

Goals This Helps With

Rehab, performance, prevention, and mobility goals this exercise supports — essential means it's a cornerstone:

Fall PreventionpreventionAnkle Sprain RecoveryrehabRunning Injury Preventionprevention