Psychology & Psychiatry

How grunting influences perception in tennis

Exceeding noise levels of 100 decibels, the grunting sounds produced by some tennis players when hitting the ball are on a par with motorbikes or chainsaws. While fans react to these impressive exhalations with either annoyance ...

Health

Bioengineers identify safer way to make rugby tackles

Bioengineers have compiled a set of recommendations that could significantly reduce concussions and other head injuries in rugby union, having assessed how head impacts and movement vary based on the position on the body ...

Health

Stabilize those stability ball workouts

(HealthDay)—For fun and fitness, it's hard to beat the value of a stability ball. You can do exercises to strengthen muscles, improve balance and increase flexibility.

Diseases, Conditions, Syndromes

Repeat infections with COVID-19 may become the norm

COVID-19 might be easing into a new status as a widely circulating and somewhat harsher version of the common cold, experts say—a virus that folks could contract repeatedly, even if they were recently infected.

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