Dept of Food and Nutrition, Lady Irwin College, New Delhi, India.
J Phys Act Health. 2014 Feb;11(2):296-302. doi: 10.1123/jpah.2012-0029. Epub 2013 Jan 30.
The relationship between leisure-time physical activity (LTPA) and cardiorespiratory fitness (CRF) is not clearly understood in Indian men. It is important to elucidate whether the duration or intensity of LTPA is responsible for increasing CRF. This will help in designing better physical activity intervention strategies for improving CRF in Indian men.
Healthy nondiabetic urban Indian men with no history of coronary heart disease (CHD) were selected (n = 603; aged 22-64 years) and their energy intake and physical activity was determined using a questionnaire. Body fat (percent) was determined by leg-to-leg bioelectrical impedance analysis while CRF was measured on multistage, continuous treadmill test using Bruce protocol.
Intensity of physical activity (METs) emerged as the best independent predictor of CRF (β = 0.217; P < .001). Using univariate General Linear Model, it was found that CRF is more a function of LTPA intensity than LTPA duration, since LTPA duration was not related to CRF when controlled for LTPA intensity. However, LTPA intensity remained significantly associated with CRF even after adjustment for LTPA duration.
LTPA of preferably higher intensity should be incorporated in the lifestyle to improve CRF and prevent CHD in Indian men.
在印度男性中，休闲时间体力活动（LTPA）与心肺适能（CRF）之间的关系尚不清楚。阐明是 LTPA 的持续时间还是强度负责提高 CRF 非常重要。这将有助于为提高印度男性的 CRF 设计更好的体育活动干预策略。
选择了健康的、无糖尿病的、无冠心病（CHD）病史的城市印度男性（n = 603；年龄 22-64 岁），并使用问卷确定他们的能量摄入和体力活动。身体脂肪（%）通过腿部到腿部生物电阻抗分析确定，而 CRF 使用 Bruce 协议的多阶段连续跑步机测试进行测量。
体力活动强度（METs）是 CRF 的最佳独立预测因子（β=0.217；P<.001）。使用单变量一般线性模型发现，CRF 更多地是 LTPA 强度的函数，而不是 LTPA 持续时间的函数，因为在控制 LTPA 强度时，LTPA 持续时间与 CRF 无关。然而，即使在调整了 LTPA 持续时间后，LTPA 强度仍然与 CRF 显著相关。
为了提高 CRF 并预防印度男性的 CHD，应将强度更高的 LTPA 纳入生活方式中。
