While some measures of physical fitness such as athletic ability and one's strength or stamina may be difficult to ascertain right away, others are more obvious. One's resting heart rate, for instance, is easy to check and says a lot about a person's wellbeing. "Your heart rate is one of the first signs that gives your doctor insight into your overall health," says Doris Chan, DO, a cardiologist at NYU Langone Hospital in Brooklyn. "It guides us in the right direction when, and if, further testing is necessary." Despite the importance of resting heart rates, some people don't understand what…

Antibodies that can neutralise virtually all known Covid variants have been discovered by scientists, offering hope of preventing future coronavirus outbreaks. The antibodies were initially isolated from the blood of a recovered SARS patient who went on to receive a Covid-19 vaccine. Duke-NUS Medical School in Singapore, which led the research, said in a statement: ‘This unique combination of prior coronavirus infection and vaccination generated an extremely broad and powerful antibody response capable of stopping nearly all related coronaviruses tested.’ Six antibodies were obtained that could neutralise multiple coronaviruses, including SARS-CoV-2 – Covid-19 – its variants Alpha, Beta, Gamma, Delta…