This study investigated the impact of the 2019 coronavirus disease (COVID-19) pandemic on health-related quality of life (HRQoL) and psychological status among Saudi adults, and whether physical activity modifies this association. The participants were 518 adults aged ≥18 years (67.4% men). Using an online survey, data regarding demographic information, the impact of COVID-19 (assessed by the Posttraumatic Stress Disorder Checklist for Diagnostic and Statistical Manual of Mental Disorders-5), HRQoL (Short Form-8), psychological distress (Depression, Anxiety and Stress Scale), and physical activity behavior (International Physical Activity Questionnaire-Short Form) were collected. The results demonstrate that adults reporting moderate or high levels of impact of COVID-19 had a lower HRQoL and higher psychological distress than adults reporting a low impact. HRQoL was higher for adults reporting any level impact (low, moderate, or high) of COVID-19 when they participated in recommended levels of physical activity (≥600 metabolic equivalent (MET)-min/week of total physical activity). Psychological distress was lower for adults reporting a high level of impact when they participated in recommended physical activity. Moderate or high levels of impact of COVID-19 were associated with a significantly lower HRQoL and higher psychological distress than the low impact of COVID-19. However, these associations were moderated by the recommended levels of physical activity.

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Background Foot characteristics and mechanics are hypothesized to affect aetiology of several lower extremity musculoskeletal conditions, including knee osteoarthritis (KOA). The purpose of this systematic review was to identify the foot characteristics and mechanics of individuals with KOA. Methods Five databases were searched to identify relevant studies on foot characteristics and mechanics in people with KOA. Meta-analyses were performed where common measures were found across included studies. Included studies were evaluated for data reporting quality using the STROBE (STrengthening the Reporting of OBservational studies in Epidemiology) checklist. Results Thirty-nine studies were included in this systematic review. Two studies reported participants with KOA had statistically significantly (P < 0.05) more pronated foot postures than those without. Meta-analyses for foot progression angle (FPA) and peak rearfoot eversion angle found no difference between those with and without KOA (FPA mean difference:-1.50 [95% confidence interval − 4.20-1.21]; peak rearfoot eversion mean difference: 0.71 [1.55–2.97]). Conclusion A more pronated foot posture was noticed in those with KOA. However, it was not possible to establish a relationship between other foot characteristics or mechanics in people with KOA due to heterogeneity between the included study and limited number of studies with similar measurements. There is need for identifying common measurement techniques and reporting metrics when studying the foot in those with KOA.

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