Pulmonary Rehabilitation Research Group, University Hospitals of Leicester National Health Service Trust, Glenfield Hospital, Leicester, United Kingdom.
J Cardiopulm Rehabil Prev. 2013 Sep-Oct;33(5):309-13. doi: 10.1097/HCR.0b013e3182a0297e.
The Incremental Shuttle Walk Test (ISWT) is an important functional and prognostic marker in chronic disease. Aging has a detrimental effect on exercise performance. The objective of this study was to produce normal age-specific values for the ISWT in a healthy British population and to explore whether additional variables improve the accuracy of a predictive equation.
Healthy subjects (N = 152), aged 40 to 90 years, were recruited. Data collection occurred over 2 study visits. Anthropometric and demographic data were collected, and lung function and quadriceps maximal voluntary contraction were measured. An accelerometer was worn for 2 consecutive days at home. The Duke Activity Status Index was completed, and the greatest distance from 2 ISWTs was recorded.
One hundred forty subjects (56 men) with mean age (SD) of 59.4 (11.0) years completed 2 ISWTs. Forced expiratory volume in 1 second (FEV(1)) was 109.1% (14.56%) predicted and ISWT distance was 737 m (183 m). Age-specific normal values for the ISWT were observed: mean (lower limit of normal)--40 to 49 years, 824 m (765 m); 50 to 59 years, 788 m (730 m); 60 to 69 years, 699 m (649 m); and 70 years and older, 633 m (562 m). A predictive equation was developed from 114 subjects. Age, body mass index, FEV(1), quadriceps maximal voluntary contraction, and Duke Activity Status Index contributed to ISWT distance predicting 50.4% of the variation in performance.
We have developed age-specific normal values for performance on the ISWT in a healthy British population. However, even using practical, clinically relevant variables, it is not possible to accurately predict exercise capacity from a regression equation.
递增穿梭步行测试（ISWT）是慢性疾病中重要的功能和预后标志物。衰老对运动表现有不利影响。本研究的目的是为英国健康人群制定 ISWT 的特定年龄正常值，并探讨是否有其他变量可以提高预测方程的准确性。
招募了 152 名年龄在 40 至 90 岁的健康受试者。数据收集在 2 次研究访问中进行。收集人体测量学和人口统计学数据，并测量肺功能和股四头肌最大自主收缩。在家中连续佩戴 2 天加速度计。完成杜克活动状态指数，并记录 2 次 ISWT 中最大的距离。
140 名受试者（56 名男性）完成了 2 次 ISWT，平均年龄（标准差）为 59.4（11.0）岁。用力呼气量 1 秒（FEV1）为预计值的 109.1%（14.56%），ISWT 距离为 737 米（183 米）。观察到 ISWT 的特定年龄正常值：平均（正常值下限）-40 至 49 岁，824 米（765 米）；50 至 59 岁，788 米（730 米）；60 至 69 岁，699 米（649 米）；70 岁及以上，633 米（562 米）。从 114 名受试者中建立了预测方程。年龄、体重指数、FEV1、股四头肌最大自主收缩和杜克活动状态指数有助于预测 ISWT 距离，可解释 50.4%的表现变异性。
我们为英国健康人群制定了 ISWT 特定年龄的正常值。但是，即使使用实用的、临床上相关的变量，也无法通过回归方程准确预测运动能力。
