Preliminary study: Psychological effects of muscle relaxation on juvenile delinquents

Naoki Nakaya, Hiroaki Kumano, Keiji Minoda, Takashi Koguchi, Kozo Tanouchi, Motoyori Kanazawa, Shin Fukudo

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The purpose of this study is to test our hypothesis that muscle relaxation Is effective on the psychological well-being of juvenile delinquents. Subjects were 16 juvenile delinquents who had entered a reform school. Subjects were divided into two groups. The muscle relaxation group received muscle relaxation therapy once a week for a total of 4 times. The control group spent an ordinary daily life In the reformatory. Psychological questionnaires used were the Rosenzweig Picture Frustration Study (P-F study), the Psychological Stress Response Scale (PSRS), and the Eysenck Personality Questionnaire (EPQ). There was a significant Group × Time Interaction of the Group Conformity Rating (GCR) of the P-F study (F [1,14] =10.1, P=0.007). There were no significant interactions In the other psychological subscales. Thus, muscle relaxation therapy may improve frustration tolerance among juvenile delinquents.

Original languageEnglish
Pages (from-to)176-180
Number of pages5
JournalInternational Journal of Behavioral Medicine
Issue number3
Publication statusPublished - 2004


  • Frustration
  • Juvenile delinquents
  • Muscle relaxation


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