Orthopedic History – Concise Timeline - ~2 years ago: Nephrotic Syndrome → prolonged corticosteroid treatment. - ~1 year ago: Steroid-associated AVN detected — one hip Stage III, other Stage II. - ~3 months after AVN diagnosis: AVN surgery was planned. - During pre-operative cardiac evaluation: Severe coronary artery disease was unexpectedly detected; patient had no previous MI or typical cardiac symptoms. - Extensive cardiac evaluation was done across India. - ~4 months ago: Underwent complex coronary intervention: RCA 90% stenosis → Rotablation + 38-mm stent, successfully completed. - Additional disease: OM1 90%, OM2 90%, LCx 70%; calcium score 931; good collaterals. - Current: AVN relatively stable; walks ~1–1.5 km but develops mild pain, making brisk walking difficult. Orthopedic Question: Can low-impact exercise (e.g., recumbent stationary cycling) safely substitute for brisk walking, considering Stage III/II AVN and recent complex PCI/stenting?