KEYWORDS
Taiji;Psychosocial stress; Salivary cortisol; Salivary a-amylase; Heart rate Summary Background: St ress reducing effects of Taiji, a mindful and gentle form of body movement, have been reported in previous studies, but standardized and controlled experimental studies are scarce. The present study investigates the effect of regular Taiji practice on psychobiological stress response in healthy men and women. Methods: 70 partidpants were randomly assigned to either Taiji classes or a waiting list. After 3 months, 26 (8 men, 18 women) persons in the Taiji group and 23 (9 men, 14 women) in the waiting control group underwent a standardized psychosocial stress test combining public speaking and mental arithmetic in front of an audience. Salivary cortisol and a -amylase, heart rate, and psychological responses to psychosodal stress were compared between the study groups. (ClinicalTrials.gov number, NCT01122706.) Results: Stress induced characteristic changes in all psychological and physiological mea. sures. Compared to controls, Taiji partidpants exhibited a significantly lower stress reactivity of cortisol (p = .028) and heart rate (p = .028), as well as lower a -amylase levels (p = .049). They reported a lower increase in perceived stressfulness (p = .006) and maintained a higher level of calmness ( p = . 019) in response to psychosodal stress. Conclusion: Our results consistently suggest that practidng Taiji attenuates psychobiological stress reactivity in healthy subjects. This may underline the role of Taiji as a useful mind-body practice for stress prevention.