Abstract：
A Randomized Controlled Trial involving 158 Brazilian medical and nursing students assessed one of three conditions over an 8-week period: 1) a circuit training protocol (CTG); 2) a yoga protocol (YG); or 3) no intervention (CG). The objective was to evaluate the effectiveness of circuit training and yoga protocols in reducing perceived mental stress and examining their effects on serum cortisol levels, as well as on traditional cardiovascular risk factors (CRFs), during an academic semester. Mental stress was measured using self-reported stress questionnaires. For the CTG, comparisons of pre- vs. post-intervention data indicated a reduction in self-reported stress levels on a Brazilian scale (p < 0.001) and an international scale (p < 0.05). Regarding CRFs, there was a reduction in waist circumference (WC) (p < 0.05), systolic blood pressure (SBP) (p < 0.05), and heart rate (HR) (p < 0.001). No changes were observed in diastolic blood pressure (DBP) (p = 0.211) and serum cortisol (SC) (p = 0.423). In the YG, pre- vs. post-intervention data indicated a reduction in self-reported stress levels on the ISSL (p < 0.001), in both resistance and exhaustion stress levels on the PSS scale (p < 0.001), and in SC levels (p < 0.001), WC (p < 0.05), and SBP (p < 0.05); however, HR and DBP did not change (p = 0.168 and p = 0.07, respectively) in this group. No changes were noted in any measures in the CG. The intervention protocols demonstrated that both CTG and YG can positively impact mental or biochemical stress responses, as well as CRFs.
摘要：
一项涉及158名巴西医学和护理专业学生的随机对照试验在8周内评估了三种情况之一：1）电路训练方案（CTG）；2）瑜伽方案（YG）；或3）无干预（CG）。目的是评估电路训练和瑜伽协议的有效性，以减少感知的精神压力，并检查其对血清皮质醇水平的影响，以及传统的心血管危险因素(CRF)，在一个学术学期。使用自我报告的压力问卷测量精神压力。对于CTG，pre与pre的比较干预后的数据表明,在巴西量表(p<0.001)和国际量表(p<0.05)上,自我报告的压力水平有所下降.关于CRFs，腰围（WC）减少（p<0.05），收缩压（SBP）（p<0.05），心率（HR）（p<0.001）。未观察到舒张压（DBP）（p=0.211）和血清皮质醇（SC）（p=0.423）的变化。在YG中,前vs.干预后数据表明，ISSL的自我报告压力水平降低(p<0.001)，在PSS量表上的抗性和疲惫应激水平(p<0.001)，在SC水平(p<0.001)，WC(p<0.05)，和SBP(p<0.05)；然而，在该组中，HR和DBP没有变化（分别为p=0.168和p=0.07）。CG中的任何测量均未发现变化。干预方案表明，CTG和YG都可以对精神或生化应激反应产生积极影响。以及CRFs。
