Inclusion Criteria:  Community residents (a) who are 40-64 years old, (b) with a VAT of ≧ 100 cm2 measured using a body composition analyzer, and (c) who can communicate in Mandarin or Taiwanese will be included.  Exclusion Criteria:  This study will exclude (a) residents with recent unstable conditions (stroke, cardiovascular and respiratory diseases, handicap, pregnancy, mental disorders, systolic blood pressure > 200 mmHg, or diastolic blood pressure > 110 mmHg), (b) residents with contraindications to body composition analyzer measurement (e.g., people with pacemakers, artificial metal joints, and amputated hands or feet) and residents who cannot stand during testing, and (c) residents with habits or lifestyles that may affect HRV (e.g., smoking or alcohol abuse and shift work).