雖然研究證實身體活動對心血管疾病具有預防效果，但有關休閒時間身體活動對中風的影響，仍未建立起一致的看法。因此本研究目的在於分析不同休閒時間身體活動量效關係對中風發生率之關聯，並從中年（50~64歲）及老年（65歲以上）年齡層比較其差異。本研究方法使用行政院衛生署國民健康局中年及老年人長期追蹤調查2003至2007年資料，以2003年50~96歲，未曾有中風病史之中年及老年男女受試者計5,046人做為樣本基礎資料來源，然後將受試者的平時身體活動狀況分成高低不同量之4組，並追蹤受試樣本中風發生情形至2007年止，將所有資料登錄並以多變項羅吉斯迴歸模式分析後，結果發現只有高身體活動量組較無身體活動習慣組，有顯著較低中風發生之勝數比。在中年及老年年齡層分析上，65歲以上受試者在高、中、低身體活動量中風發生之勝數比雖低於無身體活動習慣組，但只有高身體活動量組達顯著差異。65歲以下受試者之不同身體活動量各組在中風發生勝數比上則皆不顯著。綜合研究結果，本研究結論發現較高休閒時間之身體活動量，顯著影響中年及老年人之中風發生率，特別是每週從事身體活動至少3次，且每次至少30分鐘以上，有助於降低中風之發生風險，且依中老年齡差異而有不同關聯。

It is well documented that physical activity reduces the risk of cardiovascular disease. However, the role of physical activity duration in the prevention of stroke still needs further investigations. This study aimed to examine the association between leisure-time physical activity and incidence of stroke in middle aged (50-64 years) and older (65 years and over) Taiwanese. The analyses were done based on the national representative data from the Taiwan's Health and Living Status of the Elderly Survey conducted in 2003 and 2007. Subjects with previous stroke history were excluded from the study. The data from the cohort of 5,046 participants aged 50 years and above in 2003 were analyzed and followed-up for 4 years. The participants reported their frequency and duration of physical activity at baseline according to four categories of activity status: none, light, medium and high physical activity. Multivariate logistic regression models were conducted to assess the associations between dose-response of physical activity and stroke incidence. The results indicated that participants engaging in high level of physical activity had significant lower risk of stroke incidence compared with those, who reported no physical activity. A similar result was observed in older subjects aged 65 or above. In contrast, these beneficial associations were attenuated in middle aged adults. In conclusion, our study showed a tendency that high level of leisure-time physical activity was associated with lower risk of stroke. Precisely, the decreased risk of stroke incidence was observed among participants, who involved in 30-minute physical activity, at least three times per a week.