Background Although evidence suggests substance and alcohol use may change during the
Covid-19 pandemic there has been no full review of the evidence around this. Methods A 

This systematic review and meta-analysis evaluated the extent of sleep disturbances during
the COVID-19 pandemic. Eleven databases and six preprint repositories were searched for 

To provide a contemporary global prevalence of mental health issues among the general
population amid the coronavirus disease-2019 (COVID-19) pandemic. We searched 

The COVID-19 pandemic has had far-ranging consequences for general physical and
mental health. Country-specific research reveals a general reduction in mental and physical 

Abstract Introduction The Coronavirus disease-19 (COVID-19) pandemic affected countries
worldwide and has changed peoples' lives. A reduction in physical activity and increased 

Study Objectives: No systematic review or meta-analysis has yet been conducted to
examine the impact of the pandemic on the prevalence of sleep problems among the 

Background The unprecedented worldwide crisis caused by the rapid spread of COVID-19
and the restrictive public health measures enforced by some countries to slow down its 

Background: The COVID-19 pandemic has drastically changed the lives of countless
members of the general population. Older adults are known to experience loneliness, age 

Background The coronavirus disease 2019 (COVID-19) pandemic has resulted in a strong
negative impact on economic and social life worldwide. It has also negatively influenced 

The coronavirus disease (COVID-19) pandemic has been devastating in all senses,
particularly psychologically. Physical activity (PA) is known to aid psychological well-being