10.3 ALS, Muscular Dystrophy and Neuromuscular Disease

Quick Answer: In ALS/MND and progressive neuromuscular disease, protect breathing and swallow pathways first, introduce equipment early enough to preserve roles, set honest short-horizon participation goals, and use submaximal function-focused activity—never exhaustive overwork as the hero plan.

Amyotrophic lateral sclerosis (ALS)—also called motor neuron disease (MND) in common Australian usage—and the muscular dystrophies and related neuromuscular disorders require a different physiotherapy mindset from acute stroke recovery. Strength may not return. The winning APC answer usually protects airway and breathing risk, prevents secondary harm, conserves energy, introduces equipment early enough, and sets honest, person-centred participation goals.

Progressive Weakness: Shared Clinical Pattern

Despite different pathophysiology, many neuromuscular cases share:

• Progressive muscle weakness and atrophy
• Rising effort cost of ADLs and walking
• Risk of falls then loss of ambulation
• Contracture and posture change risk
• Respiratory muscle involvement in many conditions (especially ALS/MND; also some dystrophies)
• Bulbar involvement in ALS (speech, swallow, saliva) with aspiration risk
• High psychological and carer load
• Need for anticipatory care planning without removing hope or agency

ALS / MND at exam level

ALS involves progressive loss of upper and lower motor neurons. Clinical mix may include:

• Limb onset weakness, cramps, fasciculations (do not over-diagnose from fasciculations alone)
• Mixed UMN/LMN signs in stems (spasticity + wasting patterns)
• Bulbar onset: dysarthria, dysphagia, sialorrhoea
• Eventual respiratory failure risk as the major life-limiting pathway for many

Physiotherapy does not reverse ALS with exercise. Physiotherapy supports function, comfort, safety, respiratory care pathways, and equipment across the disease course.

Muscular dystrophy (and related myopathies) at exam level

Muscular dystrophies are a group of genetic muscle disorders with progressive weakness; age of onset and rate vary widely (childhood presentations such as Duchenne contexts vs adult-onset limb-girdle patterns, etc.). APC-relevant themes:

• Proximal weakness patterns affecting sit-to-stand, stairs, gait
• Contracture prevention and standing programs when appropriate
• Respiratory and cardiac involvement in some dystrophies (medical surveillance domains)
• Transition across paediatric to adult services in lifespan stems
• Exercise caution: maintain activity without overwork injury to fragile muscle

You do not need every genetic subtype memorised. You need weakness + respiratory + energy + equipment + realistic goals reasoning.

Other neuromuscular stems (myasthenia gravis fluctuations, neuropathies, post-polio style fatigue) still push fatigue-aware dosing and medical liaison for unstable weakness or respiratory symptoms.

Respiratory Risk and Referral: Non-Negotiable

Respiratory complications are a top safety theme.

Warning features (escalate / medical-respiratory pathway)

• New or worsening dyspnoea, orthopnoea, or sleep-related breathing symptoms (morning headache, unrefreshing sleep, witnessed apnoeas—report to medical team)
• Weak cough, difficulty clearing secretions, recurrent chest infections
• Declining speech volume with respiratory effort, or inability to complete sentences
• Rising CO₂ retention concerns flagged medically; abnormal SpO2 trends in context
• Acute respiratory distress—emergency pathway

Physiotherapy roles (within scope and team plans)

• Early recognition and prompt referral rather than “try harder walking”
• Secretion support techniques as indicated and trained (and as disease allows)
• Positioning for comfort and ventilation efficiency
• Assisted cough / lung volume strategies when competent and protocolised in the service—never improvise advanced respiratory techniques beyond training
• Education on energy cost of mobility when respiratory reserve is low
• Coordination with speech pathology for swallow/aspiration risk that drives chest infection

Exam rule: new respiratory red flags beat ambitious gym goals. Choose the option that escalates appropriately and keeps the person safe.

Energy Conservation and Activity Design

As weakness progresses, the same task costs more energy. Teach and co-design:

1. Prioritise valued activities for good-energy windows.
2. Plan rest before and after demanding tasks.
3. Simplify tasks (sit to dress, reorganise environment, reduce unnecessary walking loops).
4. Delegate or use equipment early rather than waiting for total failure.
5. Break long outings into stages with seating options.
6. Match therapy sessions to tolerance, not a fixed athletic template.

Energy conservation is not “giving up.” It is strategic spending of a limited energy budget so the person can still do what matters.

Equipment: Timing Matters

Waiting until a catastrophic fall before considering aids is a common real-world error—and a common exam trap if options glorify “no aids to stay strong.”

Introduce equipment as enabling, trial in real environments, train carers, and review as function changes. Reassess pressure injury risk whenever mobility drops.

Realistic Participation Goals

Goal setting must be honest and hopeful:

• Focus on activities and roles (visit family, attend a ceremony, remain at home, comfort in bed mobility).
• Use short-horizon goals that can succeed even if long-term prognosis is progressive.
• Review goals frequently; celebrate maintained participation, not only improved 6-minute walk distance.
• Include carer goals (safe transfers, reduced injury risk).
• Discuss advance preferences within team pathways; physiotherapy contributes functional information without overstepping medical prognostic conversations alone.

What “good physio” looks like across stages (schematic)

Avoid Overwork Damage Concepts (Exam Level)

Classic teaching in neuromuscular disease warns against overwork weakness: excessive high-resistance or exhaustive exercise that may worsen muscle function or cause prolonged deterioration, particularly in unstable progressive myopathic/neurogenic conditions. Exact mechanisms and evidence nuances are debated in specialist literature; for APC entry-level reasoning, hold a practical safety doctrine:

Safer principles

• Prefer moderate, functional, and enjoyable activity over maximal exhaustive bodybuilding templates.
• Avoid exercise that produces lasting strength loss, severe prolonged myalgia, or multi-day functional collapse.
• Monitor for excessive fasciculation pain flares, cramping storms, or marked delayed recovery—and reduce load.
• In ALS, programmes are often low-to-moderate intensity, focused on maintaining flexibility, preventing disuse where safe, and supporting function—not aggressive progressive overload.
• In muscular dystrophy, maintain mobility and submaximal strengthening of less-affected groups carefully; respect medical restrictions (e.g., cardiac involvement contexts).
• Disuse is also harmful—complete inactivity is not the default answer either.

Balanced exam stance: choose individualised, submaximal, function-oriented activity with rest, not “no exercise ever” and not “train to failure daily.”

Red-flag exercise responses

Stop/modify and seek medical review if exercise triggers:

• Chest pain, severe dyspnoea, syncope
• Acute neurological crisis features
• Signs of rhabdomyolysis-level pain/dark urine (medical emergency thinking)
• Fall with head injury
• New bulbar choking crises during sessions

Secondary Complications You Should Prevent

• Contractures and pain from immobility—gentle ROM, positioning, standing frames when appropriate and resourced
• Pressure injuries—education, liaison, equipment
• Shoulder subluxation/pain in flail upper limbs—supportive handling
• Carer musculoskeletal injury—teach safe manual handling or hoist use
• Social isolation—participation planning with realistic transport/energy supports
• Aspiration pneumonia risk—respect speech pathology feeding recommendations; do not override swallow advice

Interdisciplinary Reality (Australian Services Context)

Expect team-based care:

• Neurologist / MND clinic / neuromuscular clinic
• Respiratory physician and ventilation services
• Speech pathology (bulbar, AAC, swallow)
• Occupational therapy (equipment, home, energy)
• Dietetics (nutrition, weight, PEG pathways when relevant—medical decision)
• Social work / palliative care / psychology
• Community nursing and support packages

Physiotherapists contribute mobility, respiratory support skills within competence, exercise advice, and falls/transfer plans. Scope discipline is an APC professional-practice theme: do not prescribe NIV settings, change PEG decisions, or stop riluzole-type medications yourself.

Putting It Together for APC Cases

When a stem describes progressive neuromuscular disease, rank options roughly as:

1. Life-threatening respiratory/swallow safety first
2. Immediate fall/transfer safety and skin integrity
3. Energy-conserving function and equipment that preserves roles
4. Submaximal activity to limit disuse without overwork
5. Long-shot maximal strengthening as sole plan last (usually wrong)

Common traps

Ethical Tone Without Soft-Washing Safety

Progressive disease cases test professionalism: truthful goal setting, respect for autonomy, cultural safety in family decision-making, and avoidance of both nihilism (“nothing to offer”) and false guarantees. There is always something to offer: comfort, safer movement, better equipment, carer skill, breathlessness positioning advice within team plans, and advocacy for timely respiratory review.

Integration with Thresholds Competencies

• Person-centred, shared decisions under uncertainty
• Risk management and escalation
• Collaborative practice
• Reflective adjustment of goals as function changes
• Health promotion reframed as supported participation, not athletic performance

APC Case Pattern: Ranking Options in Progressive Neuromuscular Stems

Work top-down:

1. Airway / breathing / swallow red flags → medical-respiratory and speech pathology pathways
2. Immediate falls, transfer, and skin safety → equipment and carer training now
3. Energy conservation for valued roles → paced activity and distance mobility options
4. Submaximal exercise to limit disuse without overwork
5. Maximal progressive overload as sole plan → almost always the distractor

Australian MND clinics, community packages, and palliative-integrated pathways expect physiotherapists who can hold hope and honesty together: there is always something useful to offer, and it is rarely “train to failure.”

Closing Exam Anchor

If you remember only one sentence from this section: in ALS and progressive neuromuscular disease, protect breathing and swallow pathways first, conserve energy with timely equipment, set honest participation goals, and use submaximal function-focused activity—never exhaustive overwork as the hero plan.