id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
bam-9509	Khosravi, Mohsen	COVID-19 quarantine: Two-way interaction between physical activity and mental health	2021	4	.pdf	application/pdf	2537	159	48	In detail, during quarantine time, physical activity levels appear to decrease while the amount of time spent in sedentary behaviors potentially increases due to limited opportunities for activity.17 Besides, the recent COVID- 19 disaster has posed major challenges for maintaining people’s mental health.18 As a result, both people with or without a history of mental illness may experience high levels of distress and double pressure at the time of the COVID-19 pandemic, particularly in isolation.19 For instance, a 2020 rapid review indicated that quarantine causes acute negative psychological effects with potentially long-term consequences.20 Several recent studies on adults in all parts of the world have revealed high levels of depressive and anxiety symptoms, probably associated with the COVID-19 pandemic.11 Since current empirical evidence suggested positive benefits of regular physical activity and physical exercise to mental health outcomes of COVID-19 quarantine, a sedentary lifestyle may serve to complicate an already- problematic situation.17,21-24 In other words, exercise is a control mechanism for many mentally ill people and a protective factor for those without any psychological disorders.19 Some of the positive effects of regular physical activity on psychological health include: (i improving one’s self-esteem and a sense of well-being; (ii reduction of stress, anxiety, and depression by making changes in the hypothalamic-pituitary-adrenal axis and mediation of the endogenous opioid system; and (iii upregulation of different trophic factors, such as brain- derived neurotrophic factor.22 A recent study has recommended that the time required for exercising COVID-19 quarantine: physical activity and mental health Eur J Transl Myol 2020; 30 (4): 9509.  COVID-19 quarantine: physical activity and mental health Eur J Transl Myol 2020; 30 (4): 9509.	cache/bam-9509.pdf	txt/bam-9509.txt