Isolation and the absence of family and friends have taken a toll on athletes’ mental health at the Tokyo Olympics, with some struggling to cope with the challenges posed by the pandemic while carrying their country’s hopes on the global sports stage.

Australian authorities said mandatory hotel quarantine for people arriving for the Australian Open tennis tournament was essential to stop Covid-19, as the country recorded another day with no new locally acquired cases on Jan. 19.

Dr. Ann McKee of Boston University studies the brains of deceased football players at the world’s largest brain bank, hoping to learn about the long-term impact of repeated head traumas for people ranging from professional athletes to victims of domestic abuse.

ADHD (attention-deficit/hyperactivity disorder) may be more common in elite athletes, a new research review suggests.

Levels of a protein called tau in spinal fluid may help predict which former pro athletes with multiple concussions will end up with long lasting effects from their history of jolts to the brain, a new study suggests.

Taking caffeine before exercise could improve performance during a broad range of exercise tasks, according to a new review of past research.

Although space travel exposes astronauts to forms of radiation that are uncommon on Earth, and that are linked to cancers and heart problems, a U.S. study suggests this does not significantly shorten their lives.

Compared to inactive people, recreational soccer players have lower cholesterol, blood pressure and resting heart rates as well as less fat mass, a research review suggests.

Two Swiss freestyle skiers were the first athletes confirmed to have been hit by a highly contagious virus that causes vomiting and diarrhea at the Pyeongchang Winter Games, the Swiss Olympic team confirmed on Friday.

Pyeongchang Winter Olympics organizers (POCOG) said on Monday a total of 177 norovirus cases had been confirmed so far at the Games, but that the athletic delegations remained unaffected.