51.   An amino acid produced naturally in the liver, kidney and pancreas, the food supplement is commonly used by athletes to increase strength and muscle mass.

52.   An amino acid produced naturally in the liver, kidney and pancreas, the supplement is commonly used by athletes to increase strength and muscle mass.

53.   Are Olympic athletes using medication for treating or cheating?

54.   Athletes use clenbuterol to bulk up their muscle mass.

55.   Athletes caught using the drug face two-year bans, he said.

56.   China signed an agreement with Norway on Thursday to fight doping in sports and said such cooperation helps to counter suspicion in the West that Chinese athletes use drugs.

57.   Diuretics are sometimes used by athletes to reduce weight quickly.

58.   For years, the athletes used their best two of three jumps in the competition.

59.   Furosemide, a diuretic, is sometimes used by athletes to shed weight quickly or to mask other forbidden products.

60.   He said Tuesday that athletes should use their position as role models to help people, adding that he had never met an Olympian who refused to volunteer.