🌬️ Pulmonary Rehabilitation Exercise Tolerance Simulator

Program Start — Poor Exercise Tolerance

A first 6-minute walk test sets the starting line for rehab.

• ~160 m: Baseline 6MWT (well below healthy norm)
• 7–8 / 10: Borg Dyspnea (severe breathlessness)
• ~26%: Muscle Endurance (deconditioned baseline)
• 3–4: mMRC Grade (breathless with minimal effort)

Why baseline testing matters

The 6MWT sets a measurable, repeatable starting point.

Deconditioning cycle

Breathlessness causes inactivity, which worsens breathlessness further.

Screening before dosing

Vitals, oxygen saturation, and risk factors are checked first.

Low-Intensity Aerobic and Strength Onset

Gentle, supervised sessions rebuild tolerance without overloading the lungs.

• +20–40 m: 6MWT Gain (early trend)
• 2–3: Sessions / Week (supervised dosing)
• Low: Intensity (40–60% peak effort)
• 3–4: Borg Target (moderate exertion range)

Dosed exercise principle

Small, controlled loads are the medicine, applied repeatedly.

Light resistance work

Bands and light weights begin building peripheral muscle strength.

Adherence sets the pace

Missed sessions slow gains more than any other factor.

Progressive Intensity and Endurance Growth

Workload rises gradually as peripheral muscles adapt to training.

• +60–120 m: 6MWT Gain (cumulative from baseline)
• ~55–70%: Muscle Endurance (mid-program level)
• Moderate: Intensity (60–80% peak effort)
• Falling: Borg Trend (same load feels easier)

Progressive overload

Speed, incline, and resistance increase in small weekly steps.

Peripheral muscle adaptation

Leg muscles gain oxidative capacity, easing the load on lungs.

Symptom-guided pacing

Sessions adjust in real time to breathlessness and fatigue.

Near-Completion Distance Breakthrough

Cumulative training produces a visible jump in walk distance.

• +150–250 m: 6MWT Gain (from baseline)
• ~80%: Muscle Endurance (near target)
• ~30 m: Minimal Clinically Important Diff. (threshold met early)
• ~2–3: Borg at Prior Load (markedly reduced)

Compounding weekly gains

Small consistent improvements now sum to a large total.

Clinical significance

The gain now exceeds the minimal clinically important difference.

Maintenance planning begins

Staff start preparing a plan to sustain gains after discharge.

Sustained Tolerance Gain, Reduced Dyspnea

The same daily workload now costs far less breath than before.

• ~430 m: Final 6MWT (best-case adherence)
• ~1.5–2: Borg at Discharge (mild exertion)
• ~90%: Muscle Endurance (program peak)
• Improved: Quality of Life (per validated questionnaires)

Outcome summary

Distance up, dyspnea down, endurance up — durable improvement.

Same workload, less symptom

The core rehab effect is reduced perceived effort at any load.

Home maintenance program

Patients continue dosed activity to preserve the gains long-term.

Program milestones at a glance