Rehabilitation Principles

The rehabilitation assessment combines tissue, function, pain, psychology, and goals.

Tissue and stage: what is injured, what healing stage, and is the tissue ready for the next rehabilitation stage.

Functional assessment - what the patient can do NOW:

• •ROM (active and passive, compared contralaterally, fixed or flexible restriction).
• •Strength (manual muscle testing, hand-held dynamometry, or functional tests such as single-leg squat, calf raise endurance, grip strength). Test inner and outer range, concentric and eccentric.
• •Endurance (repeated contractions, timed holds, functional tasks) - endurance deficits persist longer than strength deficits and are frequently overlooked.
• •Proprioception and balance (single-leg stance, Star Excursion Balance Test/Y-balance test).
• •Functional capacity (sport-specific or occupation-specific tasks).
• •Gait analysis (antalgic, compensatory, symmetry).

Pain assessment: location, severity (0-10 NRS), and behaviour - what provokes and relieves. The pragmatic 'acceptable pain' principle (not a formal NICE recommendation) considers manageable pain during exercise (commonly 5/10 or less) acceptable if it settles within 24 hours and does not progressively worsen. UNACCEPTABLE pain includes night pain waking from sleep, progressive rest pain, pain not settling within 24 hours, and pain worsening session-on-session.

Psychological assessment (the biopsychosocial model): psychological factors are among the strongest predictors of outcome - often more predictive than tissue pathology.

• •Fear-avoidance beliefs (fear that movement will cause damage) - a major rehabilitation barrier.
• •Catastrophising (exaggerated negative interpretation of pain) - strongly associated with poor outcomes.
• •Kinesiophobia (fear of movement).
• •Self-efficacy (confidence in self-management) - low self-efficacy predicts poor adherence.
• •Mood (depression, anxiety) impairs engagement.
• •Social factors: work demands, financial pressure, support network, access to facilities.
• •Validated tools: Tampa Scale of Kinesiophobia, Pain Catastrophising Scale, PHQ-9, STarT Back Screening Tool (low back pain risk stratification per NICE NG59).

Adherence is among the strongest predictors of outcome - actively assess and address barriers (complexity, understanding, motivation, pain, psychology, time, access).

Goal-setting uses SMART goals (specific, measurable, achievable, relevant, time-bound) - patient-centred goals improve adherence and motivation.

Outcome measures and assessment tools guide and monitor rehabilitation.

Objective outcome measures:

• •ROM: goniometry; inclinometry for spinal ROM; compare contralateral.
• •Strength: manual muscle testing (Oxford 0-5, limited sensitivity); hand-held dynamometry (more objective); isokinetic dynamometry (Biodex - gold standard, used in elite sport); functional strength tests (single-leg squat quality, hop for distance, calf raise to failure).
• •Hop tests (particularly ACL rehabilitation): single hop, triple hop, crossover hop, timed 6-metre hop. Limb Symmetry Index (LSI) 90% or more is the commonly used benchmark; important limitation - the contralateral limb may also have deconditioned ('bilateral deficit'), artificially inflating the LSI. Absolute strength metrics or pre-injury baseline data are preferred where available.
• •Y-balance test/SEBT: dynamic balance and neuromuscular control; asymmetry over 4 cm or low composite scores may indicate increased injury risk.
• •Sport-specific GPS and accelerometer load monitoring quantify external load (distance, speed, accelerations) during the graduated return-to-running and return-to-training phases - especially in team sports.

Patient-reported outcome measures (PROMs): DASH (upper limb), Oxford Knee/Hip Score, Oswestry Disability Index (lumbar), Neck Disability Index, VISA-A (Achilles), VISA-P (patellar), EQ-5D (quality of life).

Psychological readiness tools: ACL-RSI (ACL - Return to Sport after Injury) assesses psychological readiness and is an independent predictor of successful return. The Tampa Scale of Kinesiophobia quantifies fear of movement.

When to investigate further: failure to progress as expected (reassess diagnosis, consider imaging); new or worsening symptoms (investigate complication); persistent pain disproportionate to healing stage (reconsider diagnosis, consider central sensitisation).

Core principles:

• •Progressive overload (the most important principle): tissues adapt to demand. Progress load, volume (reps/sets), complexity (single-leg, unstable surface, multi-directional), speed (slow to fast), or functional demand. Manipulate one variable at a time. The FITT principle (frequency, intensity, time, type) structures progression.
• •Specificity (SAID principle - Specific Adaptation to Imposed Demand): rehabilitation must replicate the demands the tissue will face. Energy system specificity matters (aerobic for endurance sport, anaerobic power for sprinting).
• •Individualisation: age, comorbidities, baseline fitness, injury severity, healing stage, psychology, goals, adherence capacity. Use frameworks then individualise - avoid cookbook protocols.
• •Patient education is itself a key intervention - explaining that pain does not equal damage is one of the most important messages.
• •Kinetic chain: address proximal AND distal contributing factors, not just the injured structure.
• •Flare-up management: flare-ups are common and rarely indicate harm; temporary load reduction (not cessation) is usually appropriate. Normalise and plan for flare-ups.

The PEACE and LOVE framework (for acute soft-tissue injury):

• •PEACE (acute, 1-3 days): Protect (brief, not prolonged), Elevate, Avoid anti-inflammatories (avoid routine NSAID use early; pragmatic short-term use acceptable), Compress, Educate.
• •LOVE (subacute, from day 3-5): Load (early progressive loading), Optimism (positive psychology), Vascularisation (aerobic exercise), Exercise (therapeutic exercise is the treatment).
• •Key shift from RICE/PRICE: 'Rest' is replaced by brief 'Protect' then early 'Load'; 'Optimism' integrates the psychological dimension.

The rehabilitation loading continuum:

• •Stage 1 - Isometric loading: sustained contractions without joint movement; pain modulation; safe starting point when pain is high or tissue is early in healing.
• •Stage 2 - Isotonic loading (strength through range): concentric and eccentric through range. Heavy slow resistance (HSR) is effective in tendinopathy. Progress load, ROM, and tempo.
• •Stage 3 - Functional and power loading: compound movements at variable speed and direction.
• •Stage 4 - Energy-storage/plyometric loading: running, jumping, hopping, throwing; the most demanding stage and essential for return to sport. Progress double-leg to single-leg, low to high amplitude, linear to multidirectional.
• •Stage 5 - Sport-specific/occupation-specific: full replication of target demands, criteria-based progression to unrestricted activity.

The return-to-sport continuum (adapted from Ardern et al., the modern UK SEM standard):

• •Return to participation: modified training, non-contact.
• •Return to sport: full sport but may not be at pre-injury performance level.
• •Return to performance: pre-injury level achieved.

Universal RTS criteria: pain-free function and pain-free palpation; full ROM compared contralaterally; strength typically 90% or more of contralateral (LSI 90% with caveats above; absolute metrics where available); adequate endurance; proprioception/Y-balance within acceptable limits; passed functional testing battery (hop tests, agility, sport-specific); completed full sport-specific training without symptoms; psychological readiness (e.g. ACL-RSI for ACL). Imaging is NOT routinely required to be 'normal' before return - many imaging abnormalities persist after clinical recovery.

Shared decision-making: athlete, clinician, coach, and support staff input the RTS decision. Periodisation aligns rehabilitation with the wider training cycle. Communication with coaching staff and graduated RTP protocols (e.g. World Rugby graduated return-to-play, FA, sport-specific guidelines) frame the final stages.

Other management adjuncts:

• •Neuromuscular control and proprioception training: deteriorates rapidly after injury; balance, agility, and perturbation work reduce re-injury (ankle sprain recurrence reduced ~35-50%).
• •Manual therapy: short-term symptom relief only; use alongside exercise (NICE NG59 recommends only as part of a package).
• •Corticosteroid injections: short-term pain relief but can inhibit long-term healing and increase recurrence (lateral elbow, LEAP trial for gluteal tendinopathy); active loading is superior mid-to-long term.
• •Pharmacological pain relief is to facilitate rehabilitation, not to cure pathology.
• •Prehabilitation (exercise before surgery) improves post-operative outcomes - strongest evidence for joint replacement and ACL reconstruction.

Common errors: too much rest (the biggest); progressing too fast; stopping too early (tissue remodelling takes months); ignoring the kinetic chain; ignoring psychology; passive treatment dependence; rigid time-based protocols.

Condition-specific rehabilitation frameworks integrate the universal principles with tissue-specific timelines.

ACL reconstruction rehabilitation: typically 9-12 months minimum; criteria-based. Phases: protection and ROM (0-6 weeks) then strengthening (6 weeks to 4 months) then running (4-6 months) then agility and plyometrics (6-9 months) then return to sport (9-12+ months). Key criteria: full ROM; quadriceps LSI 90% or more; hamstring LSI 90% or more; hop tests LSI 90% or more; Y-balance symmetry; psychological readiness (ACL-RSI); completed full unrestricted training. FIFA 11+ reduces ACL injury rates by approximately 50%.

Tendinopathy rehabilitation: isometric then isotonic (HSR) then energy-storage then sport-specific over 3-6+ months (see Tendinopathy General Principles topic).

Muscle injury rehabilitation: PEACE and LOVE then progressive loading then eccentric strengthening then running progression then sport-specific. Criteria-based (see Muscle Injuries topic).

OA rehabilitation (per NICE NG226): exercise is a core treatment for ALL OA patients - strengthening, aerobic, and flexibility, sustained long-term, with weight management alongside. Do NOT routinely offer TENS, acupuncture, or electrotherapy.

Spinal pain rehabilitation (per NICE NG59): stay active, therapeutic exercise; manual therapy only as part of a package with exercise; STarT Back Screening Tool to stratify risk; combined physical-psychological programmes for persistent pain with psychosocial obstacles. Do NOT routinely offer acupuncture, TENS, or electrotherapy.

Chronic pain rehabilitation (per NICE NG193): for primary chronic pain - supervised group exercise programmes and psychological approaches (CBT, ACT). Do NOT initiate paracetamol, NSAIDs, or opioids as standalone treatments. Manage flare-ups with temporary load reduction, not cessation.

Prehabilitation: exercise before surgery to optimise strength, fitness, and function. Includes strengthening, aerobic fitness, weight management, education, and psychological preparation.

• •NICE NG226 (Osteoarthritis in over 16s, 2022) - therapeutic exercise as a core treatment for all OA patients.
• •NICE NG59 (Low back pain and sciatica in over 16s) - stay active, exercise, manual therapy only as part of a package; STarT Back Screening Tool for risk stratification.
• •NICE NG193 (Chronic pain in over 16s) - supervised group exercise and CBT/ACT for primary chronic pain; do NOT initiate paracetamol, NSAIDs, or opioids as standalone treatments.
• •PEACE and LOVE framework (Dubois and Esculier, 2020) - modern soft-tissue injury management emphasising early loading and education.
• •Criteria-based return-to-sport consensus (Ardern et al., 2016 BJSM consensus statement) - the three-stage continuum (participation, sport, performance) and shared decision-making.
• •Validated outcome measures: VISA-A/P, DASH, Oxford Knee/Hip Score, Oswestry Disability Index, ACL-RSI, Tampa Scale of Kinesiophobia, Pain Catastrophising Scale.

• •Tissues adapt to load (Wolff's and Davis's laws); progressive overload is the fundamental principle of rehabilitation.
• •The loading continuum: isometric, isotonic/HSR, functional, plyometric, sport-specific.
• •PEACE and LOVE replaces RICE/PRICE; avoid routine NSAIDs in the first 48-72 hours.
• •Return-to-sport continuum: participation, sport, performance; criteria-based, NOT time-based.
• •LSI 90% or more is the standard benchmark; bilateral deficit can inflate LSI - use absolute metrics where available.
• •Biopsychosocial: fear-avoidance, catastrophising, kinesiophobia are among the strongest predictors of outcome.