Inclusion Criteria:

1. Women aged 20 years and older

2. Histologically confirmed stage 0 to III breast cancer who received curative breast
cancer surgery within 12 months since completion of primary cancer treatment and 2
years since diagnosis

3. Serum platelet ≥ 100,000/mm3

4. Serum hemoglobin ≥ 10g/dl

5. Not met one or more behavior goals: i) energy expenditure of aerobic exercise ≥ 12.5
kcal/kg/week; ii) intake of vegetables except kimchi ≥ 5 serv/day and intake of fruit
1-2 serv/day; iii) maintenance of healthy weight (18.5 kg/m2 ≤ BMI < 23 kg/m2)

6. Ability to use internet, and being accessible internet at home

7. Mobile phone user

8. Consent form to participate in the study

Exclusion Criteria:

1. Currently receiving any cancer treatment

2. Conditions that could limit adherence to an unsupervised exercise program such as
uncontrolled congestive heart failure or angina, recent myocardial infarction, or
breathing difficulties requiring oxygen use or hospitalization; walker or wheelchair
use; or plans to have hip or knee replacement

3. Conditions that could interfere with a high vegetable and fruit diet, such as kidney
failure or chronic warfarin use

4. Progressive malignant disease or additional primary cancers

5. Infectious condition (body temperature ≥ 37.2℃ or WBC ≥ 11,000mm3)

6. Inability to use computer or internet

7. Visual and motor dysfunction