Sannes Timothy S, Mansky Patrick J, Chesney Margaret A
National Center for Complementary and Alternative Medicine, Bethesda, MD, USA.
J Altern Complement Med. 2008 Jul;14(6):645-53. doi: 10.1089/acm.2007.0680.
The rise in popularity of complementary and alternative medicine (CAM) in the United States has stimulated increasing interest in researching CAM. One challenge to this research is determining the optimal dose of a CAM intervention. T'ai Chi Chuan (TCC) has received considerable attention as a mind-body practice; however, it remains unclear exactly how much TCC practice is necessary to elicit a discernable effect.
In this review, we selected 19 studies and examined the variation in the number and length of training sessions. Secondary and tertiary aims include examining attendance rates for each intervention and the instructions given to participants regarding home-based practice. The degree to which investigators monitored participants' home-based practice was also examined.
In the intent-to-treat analyses, the median time of TCC practice was 2877 minutes intended for participants across the selected interventions. Fourteen (14) of the publications provided information about participant attendance in the original publication, 2 provided additional information through further author inquiry, and 3 commented on TCC practice outside of the structured class environment through author inquiry.
The data reported are inconsistent in reported attendance and home-based practice rates, making it difficult to speculate on the relationship between the amount of TCC and intervention effects. Further research could contribute to this area by determining the optimal dose of TCC instruction.
补充和替代医学（CAM）在美国日益流行，这激发了人们对研究CAM的兴趣不断增加。这项研究面临的一个挑战是确定CAM干预的最佳剂量。太极拳（TCC）作为一种身心锻炼方法受到了广泛关注；然而，究竟需要多少太极拳练习才能产生明显效果仍不清楚。
在本综述中，我们选择了19项研究，并检查了训练课程的数量和时长的变化。次要和三级目标包括检查每种干预的出勤率以及给予参与者的家庭练习指导。还检查了研究人员对参与者家庭练习的监测程度。
在意向性分析中，所选干预措施中参与者的太极拳练习中位时间为2877分钟。14篇出版物在原始出版物中提供了有关参与者出勤率的信息，2篇通过进一步询问作者提供了额外信息，3篇通过询问作者对结构化课堂环境之外的太极拳练习进行了评论。
报告的数据在出勤率和家庭练习率方面不一致，因此很难推测太极拳练习量与干预效果之间的关系。进一步的研究可以通过确定太极拳指导的最佳剂量来为该领域做出贡献。
