"I could be on the field trying to move around, but there's not enough blood and oxygen flowing in my body for me to perform well,"Fuesaina said.
"We pretty much only ate white meat and we didn't really buy red meat because it was more expensive."
"Sometimes I'd just come from work, and I'd fall asleep straight away … I was really exhausted,"she said.
"We lose iron when we menstruate, so every time we have a period, we have blood loss which is associated with iron loss,"Dr McKay said.
"They say 'oh, but I'm always tired, I have all the burden of working a full-time or part-time job, I have a family at home that I have to look after, and then on top of that I have to train ... I'm just tired whether my iron is healthy or not."
"If you're talking also in terms of socio-economic status, or regions that are lacking in red meat, that is also going to have a big effect on how much iron you're obtaining from the diet,"she said.
"You could be at risk of an iron deficiency even if you're just training three or four times a week, particularly running."