Strength Endurance Test: Single Leg Sit To Stand (Max)

The Single-Leg Sit-to-Stand Test assesses unilateral lower-limb performance by requiring the client to stand from a seated position using one leg. Research has reported inter-rater and test-retest reliability for single-leg sit-to-stand methods when chair height, setup and scoring are standardised.  

Introduction

Single-leg sit-to-stand testing provides a practical way to assess unilateral lower-limb control, strength-endurance and task capacity.

Quick Summary

Test name: Single-Leg Sit-to-Stand Test
Category: Unilateral lower-limb performance
Primary scores: Able/unable, time or repetitions
Best use: Side-to-side comparison
Key limitation: Chair height strongly affects difficulty.

What Is the Assessment?

The client stands from a seated position using one leg.

Why It Is Used

Used to assess unilateral lower-limb performance, control, strength-endurance and side-to-side differences.

What It Measures

It may reflect quadriceps capacity, hip control, balance, trunk strategy, confidence and symptom response.

Who It Is Used For

Useful for athletes, general fitness clients and lower-limb performance monitoring.

Equipment Required

• Chair or box of recorded height
• Stopwatch or Measurz stopwatch
• Measurz rep counter if repetitions are counted
• Optional Measurz AR measurement for chair height
• Optional inclinometer
• MAT tools for related isometric knee or hip strength testing

Step-by-Step Protocol

1. Client sits on a recorded-height chair or box.
2. One foot is placed on the floor; the other leg is lifted.
3. Arms are standardised.
4. Client stands fully using one leg.
5. Record success, time or repetitions.

Scoring and Interpretation

Score may be able/unable, time for repetitions, number of reps or movement-quality rating.

Normative Data, Benchmarks or Reference Values

Broad norms are limited. Use chair-height progression, side-to-side comparison and baseline/retest performance.

Reliability and Validity

Research supports inter-rater and test-retest reliability for single-leg sit-to-stand methods when standardised.  

Common Errors and Limitations

Using the non-test leg, excessive momentum, knee collapse, trunk lean, inconsistent chair height and incomplete standing.

Practical Applications

Useful for unilateral lower-limb monitoring, side-to-side comparison and progression tracking.

How to Record This in Measurz/MAT

Record side, chair height, success/time/reps, pain, symptoms, compensations and retest date.

FAQs

What does it measure? Unilateral lower-limb performance.
Does chair height matter? Yes, strongly.
Should both sides be tested? Yes.
Are there norms? Broad norms are limited.

Key Takeaways

• Practical unilateral test.
• Chair height must be recorded.
• Side-to-side comparison is key.
• Reliability depends on standardisation.
• Measurz can track height, side and reps.

References

Waldhelm, A., et al. (2020). Inter-rater and test-retest reliability of two new single-leg sit-to-stand tests. International Journal of Sports Physical Therapy.