Erin is one of the older female fighters listed in today's article. She was born on June 13, 1977, which makes her 40 years old. She keeps in excellent shape though (by doing regular exercises at the gym), which means she still wins a lot of fights (much more often than she losses). Her stats place her as 5'10 (or 177cm) tall, which is above average. Her weight is 161 pounds, or 73 kg, which is also on the heavy side of things.
Given Erin's awesome statistics (she is one of the tallest and heaviest fighters in the list), she must be consuming a lot of animal-based proteins, such as whey protein, in order to get her weight to the level it's at. Since she is also not carrying a lot of fat, that means that she incorporates a lot of high-intensity interval training types of cardio into her workouts.