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The acceleration of urbanization has highlighted the stress problems among college students, making environmental interventions to promote physical and mental health an important direction in campus health landscape research. However, the current research faces issues such as weak sample specificity, single indicators, and the absence of saturation variables, making it difficult to support precise design of campus healthy landscapes. Therefore, this study, targeting college students, employed a randomized controlled experiment to set up visual exposure scenarios with low and high saturation green and purple plants, as well as a control group without plants. The purpose of the study is to provide scientific evidence for campus plant landscape design and stress intervention for college students Measurements included systolic blood pressure, diastolic blood pressure, pulse, and Self-Rating Anxiety Scale (SAS) scores, to explore the effects of plant color saturation on physiological and psychological recovery. The results showed that visual exposure to plants effectively reduced blood pressure and anxiety levels, with low saturation plants providing better restorative benefits than high saturation and the control group. Specifically, low saturation green performed better in improving systolic blood pressure, while low saturation purple had advantages in diastolic blood pressure, pulse, and anxiety relief. The study indicates that color saturation is a key visual factor affecting the restorative effects of plant landscapes, providing references for optimizing campus health environments.
Li et al. (Thu,) studied this question.