Choi Jun Hwan, Kim Bo Ryun, Joo Seung Jae, Han Eun Young, Kim Song Yi, Kim Sun Mi, Lee So Young, Yoon Ho Min
Department of Rehabilitation Medicine (Drs Choi, Kim, Han, Kim, and Lee, and Mr Yoon) and Division of Cardiology, Department of Internal Medicine (Drs Joo and Kim), Jeju National University Hospital, University of Jeju School of Medicine, Jeju, Republic of Korea.
J Cardiopulm Rehabil Prev. 2015 Mar-Apr;35(2):140-6. doi: 10.1097/HCR.0000000000000094.
To investigate cardiorespiratory responses during exercise stress tests using an aquatic treadmill and a land-based treadmill in patients with coronary artery disease (CAD).
Twenty-one stable CAD patients were enrolled. All patients participated in 2 symptom-limited incremental exercise tests, using both an aquatic and a land treadmill. For the aquatic treadmill protocol, patients were submerged to the upper waist in 28°C water. The treadmill speed started at 2.0 km/h and increased 0.5 km/h every minute thereafter. For the land treadmill protocol, the speed and gradient were started at 2.4 km/h and 1.5%, respectively. The speed was increased by 0.3 km/h and grade by 1% every minute thereafter. Oxygen consumption ((Equation is included in full-text article.)O2), heart rate (HR), and respiratory exchange ratio were measured continuously and peak values recorded. Rating of perceived exertion, percentage of age-predicted maximal HR, and total exercise duration were also recorded.
Peak cardiorespiratory responses during both protocols were compared. The peak (Equation is included in full-text article.)O2 and peak HR did not show any significant differences. The peak respiratory exchange ratio was significantly greater using the land treadmill than the aquatic treadmill protocol. Rating of perceived exertion, age-predicted maximal HR percentage, and total exercise duration were similar for both protocols. There was a significant linear relationship between HR and (Equation is included in full-text article.)O2 with both protocols.
This study demonstrated that aquatic treadmill exercise elicits similar peak cardiorespiratory responses compared with land treadmill exercise, suggesting that aquatic treadmill exercise may be effective for CAD patients in cardiac rehabilitation.
研究冠心病（CAD）患者在使用水上跑步机和陆地跑步机进行运动压力测试时的心肺反应。
招募了21名稳定型CAD患者。所有患者都参加了2次症状限制递增运动测试，分别使用水上跑步机和陆地跑步机。对于水上跑步机测试方案，患者被浸入28°C水中至腰部以上。跑步机速度从2.0 km/h开始，此后每分钟增加0.5 km/h。对于陆地跑步机测试方案，速度和坡度分别从2.4 km/h和1.5%开始。此后速度每分钟增加0.3 km/h，坡度每分钟增加1%。连续测量耗氧量（（全文包含公式）O2）、心率（HR）和呼吸交换率，并记录峰值。还记录了主观用力程度评分、年龄预测最大心率百分比和总运动持续时间。
比较了两种测试方案期间的心肺反应峰值。峰值（全文包含公式）O2和峰值HR没有显示出任何显著差异。使用陆地跑步机时的峰值呼吸交换率显著高于水上跑步机测试方案。两种测试方案的主观用力程度评分、年龄预测最大心率百分比和总运动持续时间相似。两种测试方案中HR与（全文包含公式）O2之间均存在显著的线性关系。
本研究表明，与陆地跑步机运动相比，水上跑步机运动引发的心肺反应峰值相似，这表明水上跑步机运动可能对CAD患者的心脏康复有效。
