Lawson Health Research Institute, Aging Rehabilitation and Geriatric Care Research Centre, London, Ontario, Canada; University of Western Ontario, Faculty of Health Sciences, London, Ontario, Canada.
Lawson Health Research Institute, Aging Rehabilitation and Geriatric Care Research Centre, London, Ontario, Canada; University of Western Ontario, Faculty of Health Sciences, London, Ontario, Canada; University of Western Ontario, Schulich School of Medicine and Dentistry, London, Ontario, Canada.
Can J Diabetes. 2014 Jun;38(3):164-71. doi: 10.1016/j.jcjd.2014.03.007.
Canadian clinical practice guidelines for the management of diabetes highlight the value of physical activity for improving clinical markers and risk factors for diabetes. The use of tools like the Step Test and Exercise Prescription (STEP) in clinical practice facilitates chronic disease management and prevention through the promotion of healthy physical activity. The validity and reliability of STEP has been established previously for use with adults 65 to 85 years of age. The purpose of this study was to test the validity of the prediction equation for VO₂max from the STEP tool for use with adults older than 65 years.
Forty participants completed both the predictive self-paced VO₂max stepping protocol from the STEP tool, and a maximal graded exercise treadmill test with breath-by-breath analysis of expired gases. Tests were completed in random order, and participants rested between tests until blood pressure returned to baseline.
The average age of the sample was 43±14 years. There was a strong relationship between predicted VO₂max from STEP and direct measures of VO₂max from the maximal treadmill test in the present study (r=.78, p<0.001). Bland-Altman analysis demonstrated statistical agreement between tests, although there was systematic overestimation of 6.4 mL/kg/min.
STEP is an evidence-based cardiorespiratory fitness assessment and exercise prescription tool appropriate for use by various health professionals in clinical practice. The prediction equation for VO₂max from the STEP tool is valid for use with adults 18 to 85 years of age. However, more research is warranted to explore age corrections to the prediction algorithm among younger adults.
加拿大糖尿病管理临床实践指南强调了身体活动在改善糖尿病临床指标和风险因素方面的价值。在临床实践中使用步测和运动处方（STEP）等工具可以通过促进健康的身体活动来促进慢性病的管理和预防。STEP 的有效性和可靠性之前已经在 65 至 85 岁的成年人中得到了验证。本研究的目的是检验 STEP 工具中预测最大摄氧量的预测方程在 65 岁以上成年人中的有效性。
40 名参与者分别完成了 STEP 工具中的预测自我调节最大摄氧量踏步方案和最大递增跑步机测试，同时对呼出气体进行逐口气分析。测试以随机顺序进行，参与者在测试之间休息，直到血压恢复到基线。
样本的平均年龄为 43±14 岁。在本研究中，从 STEP 预测的最大摄氧量与最大跑步机测试的直接测量值之间存在很强的相关性（r=.78，p<0.001）。Bland-Altman 分析表明两种测试之间存在统计学一致性，尽管存在 6.4 毫升/千克/分钟的系统高估。
STEP 是一种基于证据的心肺适能评估和运动处方工具，适合各种临床实践中的健康专业人员使用。从 STEP 工具中预测最大摄氧量的预测方程在 18 至 85 岁的成年人中是有效的。然而，需要进一步的研究来探索在年轻成年人中对预测算法进行年龄校正。
