It speeds up recovery so that they can train harder/more often.
Steroids make athletes stronger. But it is illegal.
That depends on what the categories are. It also depends whether you're talking about steroids in the context of performance-enhancing drugs for athletes or steroids in the context of legitimate medical uses.
Some athletes have taken drug tests to prove they are not on steroids.
Athletes are tested for steroids and performance enhancers.
steroids
It should be: 'Some athletes took drug tests to proove they were not on steroids'
"have taken" is correct
Not usually. Steroids are injected by athletes to increase endurance and strength.
In track and field in America - 40 to 50% of the athletes In weight lifting, a competitor admitted to taking steroids and said it was okay because 80%-90% of the athletes he'd faced were using steroids
about 200
Ben Johnson
steroids