Higashimatsuyama Municipal Hospital 1 article published in JoVE Behavior Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns Masami Yokogawa1, Tomoyo Kurebayashi2, Kazuki Soma3, Hiroichi Miaki1, Takao Nakagawa4 1Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 2Rehabilitation Section, Higashimatsuyama Municipal Hospital, 3Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, 4Department of Physical and Rehabilitation Medicine, Kanazawa Medical University Here, we present a protocol to assess two deep breathing patterns of natural and diaphragmatic breathing for their effectiveness and ease of execution. Fifteen participants were selected, utilizing an electrocardiograph and expired gas analyzer for measurement of the ventilatory parameters, together with visual assessment by video capture of thoracoabdominal movement.