Single Leg Balance
Overview
Single leg balance is foundational for ACL recovery. Your ACL contains proprioceptors—sensory receptors that tell your brain where your knee is in space. Surgery disrupts these signals, making balance training essential for restoring natural movement patterns.
Key Benefits
- Restores proprioception lost from surgery
- Builds ankle, knee, and hip stability
- Develops neuromuscular control
- Reduces re-injury risk
- Prepares for sport-specific movements
Exercise Progressions
Level 1: Supported Stance (Week 4-6)
- Stand next to a wall or sturdy chair
- Place fingertips lightly on support surface
- Shift weight onto surgical leg
- Lift opposite foot 1-2 inches off floor
- Keep a slight bend in standing knee (not locked)
- Hold position for 30 seconds
- Rest and repeat 3-5 times
Focus: Minimize how much you rely on hand support. Use fingertips, not palm.
Level 2: Unsupported Stance (Week 6-8)
- Stand on surgical leg without support
- Keep arms relaxed at sides or on hips
- Fix gaze on a point at eye level
- Maintain slight knee flexion (10-15°)
- Hold for 30-60 seconds
- Perform 3-5 repetitions per leg
Cue: Imagine a string pulling the crown of your head toward the ceiling.
Level 3: Eyes Closed (Week 8-12)
- Achieve stable unsupported stance first
- Close eyes while maintaining balance
- Start with 10-15 second holds
- Progress to 30-60 seconds
- Have support nearby for safety
Why it matters: Removing vision forces your proprioceptors to work harder—this is where real progress happens.
Level 4: Perturbation Training (Month 3+)
- Stand on surgical leg, eyes open
- Have partner gently push your shoulders in random directions
- React to maintain balance without stepping
- Start with light, predictable pushes
- Progress to unpredictable perturbations
Alternative: Catch and throw a ball while balancing to create self-perturbation.
Level 5: Dynamic Balance (Month 4+)
- Single leg stance with arm reaches in all directions
- Single leg with opposite leg swings (front/back, side to side)
- Single leg mini squats (quarter depth)
- Single leg with head turns
Common Mistakes
Locked Knee
Standing with knee fully extended. Keep 10-15° bend to engage muscles properly.
Hip Drop
Pelvis tilting down on the lifted side. Keep hips level—this indicates glute medius weakness.
Breath Holding
Holding breath to "stabilize." Breathe normally throughout—real stability doesn't require this.
Progressing Too Fast
Jumping to eyes-closed before mastering eyes-open. Quality over speed.
Exercise Prescription
| Phase | Duration | Sets | Frequency |
|---|---|---|---|
| Early (Wk 4-6) | 30 sec holds | 3-5 | Daily |
| Mid (Wk 6-12) | 60 sec holds | 3-5 | Daily |
| Late (Month 3+) | 60 sec + perturbations | 3-5 | 3-4x/week |
Equipment Progressions
Foam Pad
Standing on a foam balance pad increases difficulty by creating an unstable surface. Start with eyes open.
BOSU Ball
Dome side up (easier) or flat side up (harder). Excellent for advanced proprioception work.
Balance Board
Wobble boards challenge multi-directional stability. Progress to single leg when ready.
Dyna Disc
Inflatable disc provides moderate instability. Good intermediate progression.