What the Test Measures
The single-leg balance test measures static balance — the ability to maintain a stable, controlled position on one leg without moving. It is a direct indicator of proprioception (the body's sense of its own position in space), ankle and hip stability, and neuromuscular coordination. All of these qualities decline measurably with age but are highly trainable with the right exercise stimulus.
Research consistently links poor single-leg balance with an elevated risk of ankle sprains, ACL injuries, falls in older adults, and general athletic underperformance. Mayo Clinic research found that grip strength, knee strength and balance — particularly the ability to stand on just one leg — all decline significantly in the decades after age 50. The single-leg balance test provides an accessible, equipment-free measure of a quality that matters for everyday function as much as for athletic performance.
Protocol — Eyes Open
- Stand on a firm, flat surface in bare feet or non-slip footwear
- Place hands on the hips
- Lift one foot off the floor, bending the knee to approximately 45 degrees — the raised foot should not touch the standing leg
- Start the stopwatch when the foot leaves the floor
- Hold the position until balance is lost — defined as: the raised foot touches the ground, the raised foot touches the standing leg, or the hands leave the hips
- Stop the clock at the point of failure
- Test both legs. Record both times
- Allow one practice attempt on each leg before recording the score
Eyes closed variation
The eyes-closed version of the test is significantly more demanding and produces lower times across all age groups. When visual information is removed, the body relies entirely on proprioceptive and vestibular systems. Perform the same protocol with eyes closed and compare against the eyes-closed normative data. Note: always have a wall or support within reach for safety.
Normative Data — Eyes Open
| Age Group | Excellent | Good | Average | Below Average |
|---|---|---|---|---|
| 18–39 | Over 45 sec | 30–45 sec | 15–29 sec | Under 15 sec |
| 40–49 | Over 40 sec | 25–40 sec | 12–24 sec | Under 12 sec |
| 50–59 | Over 30 sec | 20–30 sec | 8–19 sec | Under 8 sec |
| 60–69 | Over 20 sec | 12–20 sec | 5–11 sec | Under 5 sec |
| 70+ | Over 10 sec | 6–10 sec | 3–5 sec | Under 3 sec |
Normative Data — Eyes Closed
| Age Group | Excellent | Good | Average | Below Average |
|---|---|---|---|---|
| 18–39 | Over 20 sec | 12–20 sec | 6–11 sec | Under 6 sec |
| 40–49 | Over 15 sec | 8–15 sec | 4–7 sec | Under 4 sec |
| 50–59 | Over 10 sec | 5–10 sec | 2–4 sec | Under 2 sec |
| 60+ | Over 6 sec | 3–6 sec | 1–2 sec | Under 1 sec |
Coaching Points
Always test both legs and compare the scores. A significant difference between left and right (more than 5 seconds) indicates a balance or stability asymmetry that can increase injury risk — particularly at the ankle, knee and hip. Address the weaker side with targeted single-leg stability work before the asymmetry compounds under athletic loading.
Balance responds well to consistent practice. Simply standing on one leg for 30 seconds on each side, two to three times daily, produces measurable improvement within weeks. Progress to eyes-closed, then to unstable surfaces (folded mat, balance board). The improvement in proprioception transfers directly to reduced injury risk and improved movement quality across all training.
