Own elaboration
American Psychiatric Association. n.a. Warning Signs of Mental Illness. Retrieved from

Further Reading:

Galderisi, S., Heinz, A., Kastrup, M., Beezhold, J., & Sartorius, N. 2015. Toward a new definition of mental health. World psychiatry : official journal of the World Psychiatric Association (WPA), 14(2), 231–233.

Pilgrim D. 2020. Key Concepts in Mental Health. United Kingdom: SAGE

Ohrnberger J, Fichera E, Sutton M. 2017. The relationship between physical and mental health: A mediation analysis.

Social Science & Medicine, Volume 195, pages 42-49, ISSN 0277-9536. Retrieved online from

Klapow, J., 2021. What are some examples of light, moderate, and heavy exercise? | Types Of Exercise. [online] Sharecare. Available at: [Accessed 26 March 2021].