Exercise 3

The following examines the effect of different types of physical meditation (yoga and tai chi) on stress reduction, and if doing them at different points of the work day can interact with this. They suspected that doing yoga in the morning would have the greatest reduction upon stress. They recruited a sample of participants and they received training in both yoga and tai chi. Using a counterbalanced design, they asked sub-groups of the students to perform yoga in the morning or evening, or tai chi in the morning or the evening, until all students did all of the conditions. Before and after they took part in each condition, a measure of participants’ salivary cortisol was taken. Cortisol is a naturally occurring hormone which is released in response to stress. A reduction in salivary cortisol would indicate a reduction in stress. Does the type of physical meditation and when it is performed reduce stress?

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