Battista Rebecca A, Foster Carl, Andrew Jessica, Wright Glenn, Lucia Alejandro, Porcari John P
University of Wisconsin-La Crosse, La Crosse, Wisconsin, USA.
J Strength Cond Res. 2008 Jul;22(4):1236-41. doi: 10.1519/JSC.0b013e318173dbc4.
During the last decade, there has been active interest in indoor cycling (e.g., spinning) as a method of choreographed group exercise. Recent studies have suggested that exercise intensity during indoor cycling may be quite high and may transiently exceed Vo2max. This study sought to confirm these findings, as the apparent high intensity of indoor cycling has implications for both the efficacy and the risk of indoor cycling as an exercise method. Twenty healthy female students performed an incremental exercise test to define Vo2max and performed 2 videotaped indoor exercise classes lasting 45 minutes and 35 minutes. Vo2, heart rate (HR), and rating of perceived exertion (RPE) were measured during the indoor cycling classes, with Vo2 data integrated in 30-second intervals. The mean %Vo2max during the indoor cycling classes was modest (74 +/- 14% Vo2max and 66 +/- 14%Vo2max, respectively). However, 52% and 35% of the time during the 45- and 35-minute classes was spent at intensities greater than the ventilatory threshold (VT). The HR response indicated that 35% and 38% of the session time was above the HR associated with VT. In 10 of the 40 exercise sessions, there were segments in which the momentary Vo2 exceeded Vo2max observed during incremental testing, and the cumulative time with exercise intensity greater than Vo2max ranged from 0.5 to 14.0 minutes. It can be concluded that although the intensity of indoor cycling in healthy, physically active women is moderate, there are frequent observations of transient values of Vo2 exceeding Vo2max, and a substantial portion of the exercise bouts at intensities greater than VT. As such, the data suggest that indoor cycling must be considered a high-intensity exercise mode of exercise training, which has implications for both efficacy and risk.
在过去十年中，室内自行车运动（如动感单车）作为一种编排好的团体锻炼方式受到了广泛关注。最近的研究表明，室内自行车运动期间的运动强度可能相当高，可能会短暂超过最大摄氧量（Vo2max）。本研究旨在证实这些发现，因为室内自行车运动明显的高强度对其作为一种锻炼方式的效果和风险都有影响。20名健康女学生进行了递增运动测试以确定Vo2max，并参加了两节时长分别为45分钟和35分钟的室内锻炼课程录像。在室内自行车课程期间测量了Vo2、心率（HR）和自觉用力程度分级（RPE），Vo2数据以30秒间隔进行整合。室内自行车课程期间的平均Vo2max百分比适中（分别为74±14%Vo2max和66±14%Vo2max）。然而，在45分钟和35分钟的课程中，分别有52%和35%的时间处于高于通气阈（VT）的强度。心率反应表明，35%和38%的课程时间心率高于与VT相关的心率。在40节锻炼课程中的10节里，存在瞬间Vo2超过递增测试中观察到的Vo2max的时段，且运动强度大于Vo2max的累计时间为0.5至14.0分钟。可以得出结论，尽管健康、有体育活动习惯的女性进行室内自行车运动的强度适中，但经常观察到Vo2的瞬时值超过Vo2max，并且有相当一部分运动时段强度大于VT。因此，数据表明室内自行车运动必须被视为一种高强度的运动训练模式，这对效果和风险都有影响。
