登階測試評估代謝症候群風險的適用性

Background and Purpose: The field-based step test has been accepted as an alternative measure to reflect one's cardiopulmonary fitness, however, its role on risk assessment of health status is yet un known. The purpose of this study was to identify the association between step physical fitness index (SPFI) and the clustering metabolic risk factors associated with the metabolic syndrome (MS). Methods: The sample consisted of 2409 volunteers (63% men, mean age 43.7±9.0 years) who completed a comprehensive health examination and fitness evaluation. SPFI, derived from the recovery heart rate, duration of exercise and actual number of steps on a modified three-minute step test, was used to measure cardiopulmonary fitness and categorize the subjects into 5 ranks: excellent, good, average, fair, and poor. Subjects with the clustering three or more metabolic risk factors including hypertension, hyperglycernia, hypertriglycerides, lower HDL, and central obesity were classified as having the MS. Results: A negative correlation between SPFI and numbers of clustering metabolic risk factors was found significantly (Spearman's r=-0.16,1'＜0.0I). Subjects in the low fitness categories of fair and poor had higher risk of having MS than subjects with the excellent fitness (odds ratio (OR), adjusted by age and sex, 2.07 (95%CI=1.01-4.27) and 2.96 (95%CI=1.45- 6.04) respectively). Subjects with poor fitness still had higher risk of having the MS than those with average fitness (adjusted OR=2.03, 95%CI=1.35-3.07). Conclusion: Step physical fitness index of a modified 3-minute step test, as an alternative measure of fitness, was associated with the risk of the metabolic syndrome independently of age and sex. Our results support that lower cardiopulmonary fitness is associated with increased clustering of metabolic risk factors, and suggest such a field-based step test could reflect one's risk of the metabolic syndrome and might be useful for health screening.