Benefits and Interindividual Differences in Children's Responses to Extended and Intensified Relaxation Training

The present study investigates whether extended and intensified systematic relaxation training techniques lead to increased short-term and prolonged effects in settings of stress prevention. One hundred and twenty-eight fourth- and sixth-graders (aged 9.6 and 11.6 years, respectively) participated in Imagination or Progressive Muscle Relaxation (PMR). Extension consisted of a varying number of training sessions (five versus ten), while intensified training contained additional training elements to enhance the transfer to the children's daily life (yes versus no). Age, gender, anxiety, activity level and suggestibility were included as additional variables that were assumed to moderate the effects of the training. Dependent variables indicating short-term training effects included physiological parameters (heart rate, skin conductance level, skin temperature) as well as subjective ratings (mood, physical well-being, training evaluations). Medium-term training effects, measured 1 week and 2 months after the training, were related to stress experiences, somatic stress symptoms, and coping strategies reported by the children. The results do not show considerable short- or medium-term effects of extended or intensified training. In addition, no clear moderator effects were found in the present sample.