Instruct: Identify the main category of the given medRxiv paper based on the title.
Query: Decrease of heart rate variability during exercise: an index of cardiorespiratory fitness
The Psychosocial Benefits of Sport Participation During COVID-19 Are Only Partially Explained by Increased Physical Activity
Unraveling diagnostic co-morbidity makeup of each HF category as characteristically derived by ECG- and ECHO-findings, a prevalence analysis
A model to analyze rideshare data to surveil novel strains of SARS-CoV-2
An atlas of trait associations with resting-state and task-evoked human brain functional architectures in the UK Biobank
Transcriptomic clustering of critically ill COVID-19 patients
Accelerated partner therapy contact tracing for people with chlamydia: The LUSTRUM cluster cross-over randomised controlled trial
Microarray-based detection of antibodies against SARS-CoV-2 proteins, common respiratory viruses and type I interferons
Uptake of COVID-19 vaccines among pregnant women: a systematic review and meta-analysis
Biallelic and de novo variants in ATP6V0A1 cause progressive myoclonus epilepsy and developmental and epileptic encephalopathy
COVID-19 Vaccine hesitancy in Addis Ababa, Ethiopia: A mixed-methods study
Lack of evidence for infectious SARS-CoV-2 in feces and sewage
Social isolation during the COVID-19 pandemic in Spain: a population study
Positive association between country-level screening rates for chlamydia and gonorrhea and self-reported diagnoses in MSM: an ecological analysis
Molnupiravir, an Oral Antiviral Treatment for COVID-19
Antibody response to a fourth mRNA Covid-19 vaccine boost in weak responder kidney transplant recipients
Maternal obesity and metabolic disorders associate with congenital heart defects in the offspring: a systematic review
Mono- and bi-allelic effects of coding variants on disease in 176,899 Finns
Covid-19 Exposure Assessment Tool (CEAT): Easy-to-use tool to quantify exposure based on airflow, group behavior, and infection prevalence in the community
A Vaccination Simulator for COVID-19: Effective and Sterilizing Immunization Cases.
Non-pharmacological measures for the treatment of iron deficiency anemia: A systematic review and meta-analysis
The equivalence of hydration status measured by the Fresenius BCM and the Cella Bioimpedance Spectroscopy devices on hemodialysis patients
Diagnostic accuracy of a novel SARS-CoV-2 antigen-detecting rapid diagnostic test from standardized self-collected anterior nasal swabs
Using patient biomarker time series to determine mortality risk in hospitalised COVID-19 patients: a comparative analysis across two New York hospitals
Hierarchical true prevalence, risk factors and clinical symptoms of tuberculosis among suspects in Bangladesh
Molecular epidemiology of AY.28 and AY.104 delta sub-lineages in Sri Lanka