1 Before you use it
What it is
The lower limb workhorse, and the one that covers everything without its own instrument. Twenty everyday activities rated for difficulty — usual work, hobbies, bathing, walking between rooms, putting on shoes, squatting, lifting, walking a mile, stairs, standing an hour, running.
Same design family as PSFS and UEFI.
When to reach for it
Any lower limb presentation without a good condition-specific measure — calf strain, hamstring strain, quadriceps strain, ITB syndrome, shin pain, compartment syndrome, tibial stress fracture.
These are exactly the patterns that have no dedicated PROM, and this is what covers them.
Patterns it serves · 8
2 Giving it
Scoring
Twenty items, 0–4, totalling 0–80. Higher is better.
What it doesn’t measure
Pain intensity, sport-specific demand, or strength. Pair with the NPRS and a functional test.
Repeat it
3 Reading the score
Interpreting it
Interpret against baseline.
It runs the whole lower limb, so it is directly comparable across a hip, knee and ankle caseload — which region-specific measures never are.
Is the change real?
On placement
Calf strain, week 4. LEFS 51 at intake, 63 today.
Read it as 12 points up, inside the 8.1–15.3-point MDC band (measured in lower limb disorders; the figure widens with a longer interval between scores). At 4 weeks it is probably real; the library carries no LEFS MCID, so ask the patient whether it matters.
Do the number says direction; the single-leg calf-raise count and the run test say readiness. Use those to progress, and re-score the LEFS at 8 weeks.
Student trap. Reaching for a knee-specific score for a calf strain. LEFS covers the whole limb and is the right tool for the muscle-strain pages.
Official source: null. We don't host the form.
This is a learning tool. It does not diagnose patients and does not replace your clinical educator.
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