Challenge students to design an adaptive, wearable-sensor-driven exercise-prescription system for cardiac rehabilitation and a complete randomized controlled trial protocol to evaluate it; submissions must specify sensor modalities and signal-processing/feature-extraction, adaptive personalization algorithms (model selection, training/validation, decision rules), real-time safety monitoring and escalation criteria, primary/secondary outcome measures, statistical analysis plan with power/sample-size calculations, data management and regulatory pathway (e.g., FDA/CE), and ethical oversight (informed consent, DSMB); require justification of choices, implementation timeline, risk mitigation, and limitations.