This single-center, randomized controlled trial aims to evaluate the efficacy of a mobile internet-based, home-based cardiac rehabilitation program in patients with mild to moderate coronary artery stenosis. A total of 176 eligible participants will be randomized to receive either a personalized lifestyle intervention via a mobile platform or routine clinical care. The primary endpoint is the change in non-calcified coronary plaque volume, as measured by coronary computed tomography angiography (CTA) at 12 months. Participants will be followed for a total of 36 months to comprehensively assess the long-term impact of this digital lifestyle intervention on plaque progression and cardiovascular outcomes.

Inclusion Criteria:

• 1.Diagnosis of mild-to-moderate coronary artery stenosis: presence of plaque in any coronary artery causing mild (<50%) or moderate (50%-69%) luminal stenosis.

  2.Age between 18 and 70 years. 3.Asymptomatic during exercise or recovery phases of cardiopulmonary assessment, including absence of angina, ST-segment depression, or complex arrhythmias at rest or during exercise.

  4.Normal troponin levels. 5.Provided signed informed consent.

Exclusion Criteria:

• 1. Severe coronary artery stenosis. 2.Presence of severe respiratory or cardiovascular diseases (e.g., acute myocardial infarction, acute tachyarrhythmia, pulmonary edema, severe aortic stenosis).

  3.Angina symptoms or signs during low-intensity exercise (<5 METs) or recovery. 4.Complex arrhythmias at rest or during exercise. 5.Hemodynamic abnormalities during exercise (e.g., failure of systolic blood pressure or heart rate to increase, or a decrease in blood pressure with increased exercise workload).

  6.Severe psychological disorders. 7.Left ventricular ejection fraction (LVEF) < 40%. 8.Elevated troponin levels. 9.Inability to undergo cardiopulmonary exercise testing due to neuromuscular or musculoskeletal disorders.

  10.Presence of other severe comorbidities. 11.Refusal to sign informed consent.