The ACL Quality of Life questionnaire, commonly called the ACL-QOL or QOL-ACL, is an ACL-specific patient-reported outcome measure used to assess how an ACL injury affects symptoms, work, sport, recreation, lifestyle, social and emotional function. It can support ACL injury and ACL reconstruction progress tracking, but it does not diagnose ACL injury, confirm graft status or clear someone for sport on its own.
An anterior cruciate ligament injury can affect far more than knee strength, range of motion or hop performance.
Clients may report ongoing concerns about:
knee confidence
instability episodes
sport participation
work duties
lifestyle changes
emotional response
fear of re-injury
long-term knee health
quality of life
The ACL Quality of Life questionnaire, commonly called the ACL-QOL or QOL-ACL, is a patient-reported outcome measure designed specifically for people with ACL-deficient or ACL-reconstructed knees.
It is commonly used for:
ACL injury monitoring
ACL reconstruction follow-up
non-surgical ACL management
return-to-running planning
return-to-training monitoring
return-to-sport reasoning
long-term quality-of-life tracking
research and outcome reporting
The ACL-QOL is listed by Mapi Research Trust as the Anterior Cruciate Ligament-Quality of Life Questionnaire and is described as an ACL-specific questionnaire with information available on scoring, copyright, licensing and translations.
Outcome measure: ACL Quality of Life questionnaire
Abbreviations: ACL-QOL, QOL-ACL
Body region: Knee
Condition focus: Anterior cruciate ligament injury
Type: Patient-reported outcome measure
Main purpose: Assess ACL-related quality of life
Common domains: Symptoms and Physical Complaints, Work-Related Concerns, Recreational Activities and Sport, Lifestyle, Social and Emotional Concerns
Score direction: Higher scores generally indicate better ACL-related quality of life
Best used for: Baseline assessment, reassessment, ACL injury monitoring and ACL reconstruction follow-up
Key limitation: ACL-QOL does not diagnose ACL injury, confirm graft integrity or determine return-to-sport clearance on its own
The ACL-QOL is an ACL-specific patient-reported outcome measure.
It was developed to assess the impact of ACL injury on quality of life, rather than only measuring pain or basic knee function.
The questionnaire includes five domains:
Symptoms and Physical Complaints
Work-Related Concerns
Recreational Activities and Sport
Lifestyle
Social and Emotional Concerns
The ACL-QOL has been described in post-2000 validation research as a disease-specific patient-reported outcome measure for people with ACL-deficient and ACL-reconstructed knees.
The ACL-QOL is used because ACL injury can affect the client’s life in ways that physical tests may not fully capture.
A client may have improving strength, range of motion and hop testing but still report:
low trust in the knee
worry about pivoting
reduced confidence returning to sport
frustration with lifestyle changes
difficulty with work tasks
fear of re-injury
reduced social participation
concern about long-term knee problems
The ACL-QOL can help professionals:
establish a baseline
assess ACL-related quality of life
monitor change over time
identify domains that remain limited
guide education and goal setting
support return-to-sport conversations
combine quality-of-life data with physical testing
improve progress tracking in Measurz
The ACL-QOL should support assessment reasoning. It should not be used as a stand-alone diagnostic or clearance measure.
This domain may provide context about:
knee symptoms
instability concerns
pain or discomfort
swelling or physical limitations
confidence with knee-related movement
This domain may provide context about:
difficulty with work duties
work modification
confidence at work
concerns about knee symptoms during occupational tasks
This domain may provide context about:
sport participation
running, jumping, cutting or pivoting concerns
confidence returning to activity
restrictions in recreational activity
fear of re-injury during sport
This domain may provide context about:
activity choices
routine changes
restrictions in daily life
long-term participation concerns
This domain may provide context about:
worry
frustration
confidence
emotional impact
social participation
perceived quality-of-life burden
The ACL-QOL does not directly measure:
ACL integrity
graft healing
knee laxity
meniscal status
cartilage status
quadriceps strength
hamstring strength
hop performance
readiness to return to sport
The ACL-QOL may be useful for:
exercise professionals
rehabilitation practitioners
strength and conditioning coaches
sport and performance teams
allied health support teams
movement assessment professionals
students learning ACL outcome measures
professionals using Measurz or MAT for structured progress tracking
It may be relevant for clients with:
ACL injury
ACL-deficient knee
ACL reconstruction
non-surgical ACL management
recurrent knee instability concerns
reduced confidence with pivoting or cutting
sport participation concerns after ACL injury
long-term knee quality-of-life impact
The ACL-QOL is most relevant when ACL injury is a key part of the client’s presentation.
Use the ACL-QOL when you want to understand how an ACL injury affects the client’s quality of life.
It may be useful at:
initial ACL assessment
post-injury baseline
pre-operative review
post-operative follow-up
return-to-running review
return-to-training review
return-to-sport planning
long-term monitoring
discharge or progress review
The ACL-QOL is most useful when repeated over time using the same version and scoring method.
Use caution when:
ACL injury is not the main presentation
the client has general knee pain without ACL involvement
the client cannot complete the questionnaire independently
language or literacy affects responses
the wrong language version is used
sport items are not relevant
work items are not relevant
many items are missing
the score is being used as a diagnosis
the score is being used as return-to-sport clearance
The ACL-QOL should not be used to:
diagnose ACL injury
confirm ACL rupture
confirm graft status
determine graft healing
identify meniscal or cartilage injury
clear someone for sport
replace physical assessment
replace professional judgement
replace medical review where needed
ACL-QOL questionnaire
Version-specific scoring guide
Measurz recording workflow
Client-reported symptom notes
Baseline and retest dates
Optional related measures, such as:
KOOS
Lysholm Knee Scoring Scale
ACL Return to Sport after Injury scale
Tampa Scale for Kinesiophobia
Pain Self-Efficacy Questionnaire
knee range of motion
quadriceps strength
hamstring strength
hop testing
change-of-direction testing
sport exposure tracking
Explain the purpose of the questionnaire before the client completes it.
Example wording:
“This questionnaire helps us understand how your ACL injury is affecting your knee confidence, sport, work, lifestyle and quality of life. It does not diagnose the injury or clear you for sport on its own, but it helps us monitor progress over time.”
The ACL-QOL can be completed:
on paper
digitally
independently
verbally if assistance is needed
before a session
during reassessment
as part of a Measurz workflow
Ask the client to:
answer based on their ACL-related knee problem
answer all items where possible
use the response scale provided
avoid overthinking each item
ask for clarification if they do not understand wording
complete the same version at each retest
Record whether the ACL-QOL was completed:
independently
digitally
on paper
verbally
with assistance
This supports repeatability and helps interpret change over time.
If assistance is needed:
explain instructions without leading the answer
avoid telling the client which score to choose
avoid prompting toward a “better” or “worse” response
record that assistance was provided
use the same assistance approach at retest where possible
Do not guess missing responses.
For best practice:
encourage completion of all items
record missing items
record which domain the missing item belongs to
avoid calculating domain or total scores if scoring guidance does not allow it
interpret incomplete scores cautiously
use the same version and scoring rules at retest
ACL-QOL scoring can vary depending on the version and source used.
Some versions use visual analogue scale-style item scoring and convert results into a percentage score, while some clinical summaries describe a raw total score approach. Because scoring format may differ across versions, always follow the scoring instructions attached to the questionnaire being used.
For Measurz recording, document:
version used
scoring method used
total score
domain scores if calculated
score range
direction of scoring
missing items
whether scores are raw, percentage or transformed
General interpretation:
Higher scores: better ACL-related quality of life
Lower scores: greater ACL-related quality-of-life impact
Retest at meaningful time points, such as:
baseline
after early rehabilitation
before running progression
before change-of-direction progression
before return-to-training exposure
before return-to-sport decisions
after a flare-up or instability event
post-operative milestones
discharge or long-term follow-up
For consistency, record:
date
affected side
dominant side
surgical or non-surgical status
time since injury
time since surgery, if relevant
current training exposure
current running, jumping, cutting or pivoting exposure
current sport participation
recent instability episodes
current pain, swelling or symptoms
The ACL-QOL is a self-report questionnaire, so it does not create physical testing risk.
However, worsening scores may support further assessment where the client reports:
increasing instability episodes
reduced confidence
worsening sport avoidance
increasing pain or swelling
major emotional impact
reduced function despite objective progress
The ACL-QOL is interpreted as an ACL-related quality-of-life measure.
Higher scores generally indicate better ACL-related quality of life.
Lower scores generally indicate greater quality-of-life impact from ACL injury.
A higher ACL-QOL score may suggest:
better perceived knee-related quality of life
greater confidence with daily activity
fewer ACL-related concerns
better sport and recreation confidence
less lifestyle impact
less social or emotional burden
A lower ACL-QOL score may suggest:
greater ACL-related quality-of-life impact
reduced confidence with the knee
sport or recreation limitations
work or lifestyle restrictions
more worry about symptoms or re-injury
greater emotional or social impact
Look at the domain pattern rather than only the total score.
Examples:
Physical complaints may improve before sport confidence returns.
Work concerns may be low while sport concerns remain high.
Social and emotional concerns may remain even when strength improves.
Lifestyle impact may change with sport exposure and confidence.
An ACL-QOL score does not prove:
ACL diagnosis
graft integrity
graft healing
knee stability
meniscal or cartilage status
physical readiness
psychological readiness
return-to-sport clearance
whether one intervention caused change
Example wording:
“Your ACL-QOL score suggests your quality of life is improving, but sport and confidence are still affected. This does not tell us whether the ACL or graft is structurally ready for sport, but it helps us track how your knee is affecting the activities that matter to you.”
For general fitness clients, ACL-QOL may help show how ACL injury affects:
gym confidence
walking and stairs
work tasks
lifestyle routines
fear of instability
confidence with activity progression
Interpretation cautions:
sport items may be less relevant
recent flare-ups may affect responses
physical capacity should still be assessed
For athletes, ACL-QOL can help capture sport-specific quality-of-life impact.
It may help monitor:
confidence returning to training
worry about cutting or pivoting
fear of re-injury
frustration with restricted participation
social and emotional impact of being away from sport
quality-of-life response to increasing sport exposure
A high ACL-QOL score should not be treated as return-to-sport clearance on its own.
The ACL-QOL was developed mainly in adult populations, but adolescent validation research is available.
A 2021 study evaluated the validity, responsiveness, reliability and readability of the ACL-QOL in an adolescent population, noting that the ACL-QOL had already demonstrated validity, responsiveness and reliability in adult populations.
Interpretation in youth should consider:
reading level
parent or guardian support
sport exposure
school demands
emotional response
developmental stage
For clients managed without reconstruction, ACL-QOL may help monitor:
confidence with daily activity
instability concerns
sport participation
lifestyle change
work or recreation impact
Interpretation should include:
giving-way episodes
strength testing
hop testing where appropriate
movement confidence
sport goals
activity exposure
For ACL reconstruction clients, ACL-QOL may help monitor perceived quality-of-life recovery after surgery.
Interpretation should consider:
graft type if relevant
time since surgery
rehabilitation stage
strength symmetry
hop testing
sport exposure
confidence and psychological readiness
swelling or symptom response
surgical guidance where relevant
Long-term ACL injury impact may include sport participation, confidence, osteoarthritis concerns and quality of life.
Studies have reported ongoing quality-of-life impairments after ACL reconstruction and ACL deficiency, supporting the value of monitoring QoL beyond early physical recovery.
Meaningful change helps determine whether an ACL-QOL score change is likely to matter.
Key terms:
MCID / MIC: the smallest change that may be meaningful to clients or professionals, depending on method used
MDC: the amount of change likely needed to exceed measurement error
SEM: estimated measurement error around a score
Responsiveness: ability of the questionnaire to detect change over time
Meaningful change values for ACL-QOL appear less widely standardised than some broader knee measures.
Research has examined MCID after ACL reconstruction for multiple PROMs, but many studies focus on IKDC, KOOS, Lysholm and ACL-RSI rather than ACL-QOL specifically. One ACL reconstruction MCID study highlights the growing interest in MCID values after ACL reconstruction but does not make ACL-QOL the only focus.
A 2015 study reported further validation of the ACL-QOL by demonstrating responsiveness to change after ACL reconstruction.
When interpreting ACL-QOL change:
compare total and domain scores with baseline
use the same version and scoring method at retest
consider whether quality-of-life change aligns with activity exposure
compare with strength, hop and movement findings
check pain, swelling and instability history
consider confidence and psychological readiness separately
avoid over-interpreting very small changes
Reported meaningful change values may vary by:
ACL-deficient versus ACL-reconstructed knee
surgical versus non-surgical management
time since injury
time since surgery
baseline score
sport level
scoring method
follow-up timeframe
language version
When no matching MCID, MDC or SEM exists, interpretation should rely more heavily on:
baseline comparison
repeated measurement
domain pattern
client-reported change
activity exposure
instability event history
related physical assessment findings
professional judgement
Broad general-population ACL-QOL norms are limited because the ACL-QOL is an ACL-specific questionnaire.
Evidence level: Level 3 — practical comparison guidance is recommended because broad normative values are not generally applicable.
Use:
baseline comparison
retest comparison
domain-level patterns
sport exposure
confidence notes
pain, swelling and instability response
related physical assessment findings
Practical guidance:
Higher scores generally suggest better ACL-related quality of life.
Lower scores suggest greater ACL-related quality-of-life impact.
Baseline and repeated measures are usually more useful than one isolated score.
Compare scores only when the same version and scoring method are used.
Avoid using ACL-QOL as a return-to-sport threshold.
Pair ACL-QOL with knee function, strength, hop and sport-readiness measures.
Comparison should consider:
age
sex
sport level
sport type
surgical or non-surgical status
time since injury
time since surgery
previous ACL injury
meniscal or cartilage involvement
current activity exposure
The ACL-QOL has post-2000 evidence supporting its use in ACL-related populations.
A 2016 study in 579 ACL-deficient clients undergoing ACL reconstruction reported that the ACL-QOL had validity and responsiveness and followed clients at 6, 12 and 24 months after surgery.
A 2022 Dutch translation and validation study stated that the ACL-QOL is a valid and reliable injury-specific instrument to assess the impact of ACL rupture on daily life.
A 2024 review of PROMs used in ACL injury reported that ACL-QOL was one of the ACL-related measures evaluated for internal consistency, alongside Lysholm, IKDC and ACL-RSI.
Reliability and validity are stronger when:
the correct ACL-QOL version is used
the correct language version is used
all items are completed
the same scoring method is repeated
domain scores are interpreted in context
retesting occurs at meaningful time points
results are interpreted alongside physical and sport-specific assessment
Interpret cautiously when:
many items are missing
the client is outside the intended population
the client has not returned to relevant activities
sport exposure has changed substantially
the score is used as a stand-alone diagnosis or clearance decision
the language version has limited validation evidence
Common errors include:
treating ACL-QOL as an ACL diagnosis
using ACL-QOL as return-to-sport clearance
not recording the version used
not recording scoring method
mixing raw and percentage scores across retests
not recording surgical or non-surgical status
not recording time since injury or surgery
ignoring sport exposure
ignoring missing items
failing to pair it with physical testing
Limitations include:
self-report can be influenced by recent symptoms, sport exposure and confidence
scores do not identify structural knee status
broad normative values are limited
meaningful change values are not always clearly established for every population
quality of life may be affected by non-knee factors
high scores do not guarantee readiness for pivoting, contact or competition
it should be paired with history, physical testing, sport exposure and client goals
The ACL-QOL may help professionals:
document baseline ACL-related quality-of-life impact
monitor change after ACL injury
monitor progress after ACL reconstruction
identify whether sport, work, lifestyle or emotional domains are most affected
support return-to-training discussions
support long-term ACL progress tracking
improve client education
communicate progress with coaches or support teams
strengthen Measurz reports
For athletes, ACL-QOL can highlight ongoing quality-of-life impact even when strength and hop scores are improving.
For non-surgical ACL clients, it can support monitoring of confidence, instability impact and lifestyle adaptation.
For post-operative clients, it can help track whether daily life and sport-related quality of life are improving over time.
For Measurz users, ACL-QOL is most useful when combined with:
KOOS
Lysholm Knee Scoring Scale
ACL Return to Sport after Injury scale
Tampa Scale for Kinesiophobia
quadriceps strength
hamstring strength
hop testing
change-of-direction testing
movement quality
sport exposure tracking
pain and swelling records
Record:
outcome measure name: ACL Quality of Life / ACL-QOL / QOL-ACL
version used
date completed
completion method: paper, digital, interview or assisted
language/version used
affected side: left, right or bilateral
dominant side
injury status: ACL-deficient, reconstructed or other
surgical or non-surgical management
time since injury
time since surgery, if relevant
total score
domain scores, if calculated:
Symptoms and Physical Complaints
Work-Related Concerns
Recreational Activities and Sport
Lifestyle
Social and Emotional Concerns
score range used
direction of scoring: higher score indicates better ACL-related quality of life
scoring method: raw, percentage, transformed or other
missing items, if any
assistance provided, if any
recent instability episodes
current pain score, if relevant
current swelling or symptom notes
current training or sport exposure
current running, jumping, cutting or pivoting exposure
current confidence level
key quality-of-life limitations
baseline comparison
MCID/MDC/SEM comparison where supported
related physical assessment findings
interpretation notes
retest date
referral or further assessment notes where appropriate
Record whether the main limitation appears to be:
symptoms and physical complaints
work-related concerns
recreational activity or sport limitation
lifestyle limitation
social or emotional quality-of-life impact
confidence limitation
mixed ACL-related limitation
unclear due to incomplete responses
This improves:
repeatability
communication
client education
assessment reasoning
monitoring over time
team consistency
reporting quality
The ACL-QOL measures ACL-related quality of life, including symptoms, work, sport and recreation, lifestyle, and social or emotional impact.
No. ACL-QOL is ACL-specific and focuses on quality of life after ACL injury. KOOS is a broader knee outcome measure covering pain, symptoms, daily function, sport and quality of life.
Scoring depends on the version used. Record the version, score range, scoring method and direction every time. Higher scores generally indicate better ACL-related quality of life.
No. ACL-QOL measures the client’s reported quality-of-life impact. It does not diagnose ACL injury or confirm graft status.
Yes. ACL-QOL has been studied in ACL reconstruction populations and can support post-operative progress tracking.
Yes, adolescent validation research exists, but interpretation should consider reading level, sport context, school demands and developmental stage.
Meaningful change values are less standardised than some knee PROMs and should be matched to the population, version and context. When unavailable, interpret change using baseline comparison, domain pattern, activity exposure and related physical findings.
No. ACL-QOL can support return-to-sport reasoning, but it should be combined with strength testing, hop testing, movement quality, sport exposure, confidence, symptoms and professional judgement.
ACL-QOL is an ACL-specific patient-reported outcome measure.
It assesses ACL-related quality of life across symptoms, work, sport, lifestyle, and social or emotional domains.
Higher scores generally indicate better ACL-related quality of life.
Scoring method and version must be recorded clearly.
ACL-QOL does not diagnose ACL injury, confirm graft status or clear someone for sport.
Evidence supports validity, reliability and responsiveness in ACL populations.
Broad normative values are limited, so baseline and retest comparison are usually most useful.
Measurz should record version, scoring method, total score, domain scores, side, surgical status, time since injury or surgery, sport exposure, confidence and related physical findings.
Friel, N. A., Chu, C. R., et al. (2016). Validity, reliability, and responsiveness of the Anterior Cruciate Ligament Quality of Life questionnaire in a longitudinal study of anterior cruciate ligament reconstructive surgery. Journal of Orthopaedic & Sports Physical Therapy / related ACL-QOL validation literature. PMID: 26780255.
Hoogeslag, R. A. G., et al. (2022). Translation, validity, and reliability of the Dutch Anterior Cruciate Ligament–Quality of Life questionnaire. Orthopaedic Journal of Sports Medicine, 10(9). https://doi.org/10.1177/23259671221118977
Mapi Research Trust. (2026). Anterior Cruciate Ligament-Quality of Life Questionnaire. ePROVIDE. https://eprovide.mapi-trust.org/instruments/anterior-cruciate-ligament-quality-of-life-questionnaire
McPherson, A. L., et al. (2024). Usefulness of current patient-reported outcome scales for ACL injury. Orthopaedic Journal of Sports Medicine. https://doi.org/10.1177/23259671231218964
Prodromidis, A. D., Thivaios, G. C., Mourikis, A., Erginousakis, I. D., Nikolaou, V. S., Vlamis, J., & Chronopoulos, E. (2024). Patient-reported outcome measures used on patients with anterior cruciate ligament injury. Cureus, 16(7), e64546. https://doi.org/10.7759/cureus.64546
Shapiro, L. M., et al. (2021). Validity, responsiveness, and reliability of the ACL-QOL in an adolescent population. Journal of Pediatric Orthopaedics, 41(10), e917–e922. https://doi.org/10.1097/BPO.0000000000001964
Webster, K. E., & Feller, J. A. (2015). Quality of life in anterior cruciate ligament-deficient individuals: A systematic review and meta-analysis. British Journal of Sports Medicine, 49(16), 1033–1041. https://doi.org/10.1136/bjsports-2015-094864
