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Kengo Mihara
Cognitive and Molecular Institute of Brain Diseases, Kurume University, Fukuoka 830-0011, Japan

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Journal article
Published: 05 June 2020 in Sustainability
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The objective of this study was to explore the relationship between subjective happiness and subjective and objective sleep. The participants were 24 healthy university students (11 males, 13 females; mean age 22.4 ± 2.1). Their subjective happiness was measured by the Japanese Subjective Happiness Scale (JSHS). Furthermore, their subjective and objective sleep evaluation was measured by Ogri-Shirakawa-Azumi sleep inventory MA version (OSA-MA) and a non-contact sheet sensor (SS). The results indicated that participants with higher subjective happiness had objectively shorter sleep onset latency, higher sleep efficiency, and lower heart rate during sleep. On the other hand, no such correlations were found between subjective sleep evaluation with OSA and subjective happiness. These results suggest that subjective happiness is related with the ability to more easily fall asleep and better sleep efficiency.

ACS Style

Hisayoshi Okamura; Kengo Mihara; Akira Tsuda; Toshihiro Morisaki; Yoshiyuki Tanaka; Yoshihisa Shoji. Subjective Happiness Is Associated with Objectively Evaluated Sleep Efficiency and Heart Rate during Sleep: An Exploratory Study Using Non-Contact Sheet Sensors. Sustainability 2020, 12, 1 .

AMA Style

Hisayoshi Okamura, Kengo Mihara, Akira Tsuda, Toshihiro Morisaki, Yoshiyuki Tanaka, Yoshihisa Shoji. Subjective Happiness Is Associated with Objectively Evaluated Sleep Efficiency and Heart Rate during Sleep: An Exploratory Study Using Non-Contact Sheet Sensors. Sustainability. 2020; 12 (11):1.

Chicago/Turabian Style

Hisayoshi Okamura; Kengo Mihara; Akira Tsuda; Toshihiro Morisaki; Yoshiyuki Tanaka; Yoshihisa Shoji. 2020. "Subjective Happiness Is Associated with Objectively Evaluated Sleep Efficiency and Heart Rate during Sleep: An Exploratory Study Using Non-Contact Sheet Sensors." Sustainability 12, no. 11: 1.

Journal article
Published: 02 June 2020 in Sustainability
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The current study aimed to examine the effects of personal growth (PG) on psychobiological responses at baseline and responsiveness to laboratory acute stress in students. Twenty-four healthy students were recruited as participants. Participants were screened from 203 candidates according to levels of PG using Ryff’s scale and classified into high and low PG groups. During the laboratory session, 13 high and 11 low PG participants underwent the Trier Social Stress Test. Heart rate and high-frequency (HF) heart rate variability were monitored throughout the experiment. Salivary free-3-methoxy-4-hydroxyphenylethyleneglycol (MHPG) and perceived stress were measured at baseline, immediately after tasks and after a recovery period. Baseline and recovery perceived stress (tense arousal) were significantly lower in the high PG group compared with the low PG group. Free-MHPG and HF component returned to baseline levels during recovery significantly more rapidly in the high PG group compared with the low PG group. There were no significant group differences in heart rate. The results showed that high PG students have lower noradrenaline and higher parasympathetic nervous system activity before and after acute stress. These findings suggest a protective psychobiological pathway linking PG with better psychosomatic health in students.

ACS Style

Kengo Mihara; Hisayoshi Okamura; Yoshihisa Shoji; Kyoko Tashiro; Yukie Kinoshita; Akira Tsuda. Personal Growth and Psychobiological Stress Responsiveness to the Trier Social Stress Test in Students. Sustainability 2020, 12, 4497 .

AMA Style

Kengo Mihara, Hisayoshi Okamura, Yoshihisa Shoji, Kyoko Tashiro, Yukie Kinoshita, Akira Tsuda. Personal Growth and Psychobiological Stress Responsiveness to the Trier Social Stress Test in Students. Sustainability. 2020; 12 (11):4497.

Chicago/Turabian Style

Kengo Mihara; Hisayoshi Okamura; Yoshihisa Shoji; Kyoko Tashiro; Yukie Kinoshita; Akira Tsuda. 2020. "Personal Growth and Psychobiological Stress Responsiveness to the Trier Social Stress Test in Students." Sustainability 12, no. 11: 4497.