ObjectiveTo determine the association between directly measured physical activity and hospitalisation, intensive care unit (ICU) admission, ventilation and mortality rates in patients with a confirmed diagnosis of COVID-19.MethodsDirectly measured physical activity data from 65 361 adult patients with a COVID-19 diagnosis from 19 March 2020 to 30 June 2021, were grouped by activity level: low (<60 min/week), moderate (60–149 min/week) and high activity (≥150 min/week). The association of physical activity levels and the risk of adverse outcomes was analysed using modified Poisson regression. We accounted for demographics and comorbidities including conditions known to influence COVID-19 outcomes, as well as patient complexity as measured by the Johns Hopkins Adjusted Clinical Group system. The regression approach was further validated with a Bayesian network model built off a directed acyclic graph.ResultsHigh physical activity was associated with lower rates of hospitalisation (risk ratio, RR 0.66, 95% CI 0.63 to 0.70), ICU admission (RR 0.59, 95% CI 0.52 to 0.66), ventilation (RR 0.55, 95% CI 0.47 to 0.64) and death (RR 0.58, 95% CI 0.50 to 0.68) due to COVID-19 than those who engaged in low physical activity. Moderate physical activity also was associated with lower rates of hospitalisation (RR 0.87, 95% CI 0.82 to 0.91), admission to ICU (RR 0.80, 95% CI 0.71 to 0.89), ventilation (RR 0.73, 95% CI 0.62 to 0.84) and death (RR 0.79, 95% CI 0.69 to 0.91).ConclusionsAdults with high and moderate physical activity levels had significantly better outcomes than those with low activity when contracting COVID-19. The apparent protective effects of regular physical activity extended to those with concomitant chronic medical conditions.

BackgroundBoth vaccination and physical activity have been shown to independently decrease the likelihood of severe COVID-19 infection.ObjectiveTo assess the association between regular physical activity and vaccination against COVID-19 among healthcare workers.MethodsA test negative case–control study design was used to estimate the risk of having an associated COVID-19-related hospital admission, among individuals who were unvaccinated compared with those who were fully vaccinated with Ad26.COV2.S (>28 days after a single dose). 196 444 participant tests were stratified into three measured physical activity subgroups with low, moderate and high activity, to test the hypothesis that physical activity is an effect modifier on the relationship between vaccination and hospitalisation.ResultsVaccine effectiveness against a COVID-19-related admission among vaccinated individuals within the low activity group was 60.0% (95% CI 39.0 to 73.8), 72.1% (95% CI 55.2 to 82.6) for the moderate activity group, and 85.8% (95% CI 74.1 to 92.2) for the high activity group. Compared with individuals with low activity levels, vaccinated individuals with moderate and high activity levels had a 1.4 (95% CI 1.36 to 1.51) and 2.8 (95% CI 2.35 to 3.35) times lower risk of COVID-19 admission, respectively (p value <0.001 for both groups).ConclusionsRegular physical activity was associated with improved vaccine effectiveness against COVID-19 hospitalisation, with higher levels of physical activity associated with greater vaccine effectiveness. Physical activity enhances vaccine effectiveness against severe COVID-19 outcomes and should be encouraged by greater public health messaging.

Background: Improved survival in preterm infants whether due to technological progress or treatment like antenatal steroids, surfactant administration or nasal continuous positive airway pressure (NCPAP) and aggressive resuscitation have raised the question about whether the survivors would be more prone to increased morbidity and adverse neurodevelopmental disability. Methods: This was a prospective follow-up study conducted in the neonatal unit of a tertiary hospital in Johannesburg, South Africa. Bayley scales of infant and toddler development, version III, were conducted on a group of extreme low birth weight infants (ELBWI). The mean composite cognitive, language and motor sub-scales were reported. Infants were considered to be “at risk” if the composite subscale score was below 85 and “disabled” if the composite subscale score was below 70. Infants identified with cerebral palsy were also reported.Results: The mean birth weight of the study group was 858.5grams (95% CI 839.2- 877.8) and the mean gestational age was 27.5 weeks (95% CI 27.1-27.9). The majority of ELBWI enrolled in the study had at least one Bayley at a mean corrected age of 17.09 months (CI 16.04 to 18.14). The mean composite scores for cognition were 98.4 (CI 95.1-101.7), language 90.0 (CI 87.5-92.6) and motor 97.9 (CI 94.8-101.0). All mean scores fell within the normal range, but the composite language score was the lowest. The study did not diagnose cerebral palsy in any of the infants. The study found 28 (36.3%) infants to be “at risk” for neurodevelopmental delay. Significantly more males were classified as “at risk” than females (13/25 (52%) vs. 15/52 (28.8%). Late onset sepsis (sepsis18/37 (48.6%) vs. no sepsis 10/40 (25%) p=0.031) and longer duration of ventilation (median of 12 days (IQR 46) vs. median of 4.0 days (IQR 5) p=0.048) were significantly associated with an “at risk” classification. Conclusion: Rates of early neurodevelopmental impairment have altered minimally despite significant improvements in the overall survival of ELBWI. It is of paramount importance to ensure that early neurodevelopmental outcomes are accurately assessed so as to assist doctors and families in establishing a foundation for advocacy for the immediate intensive care and post discharge follow up.