It also springs up out of a pleasure of playing the game and a consciousness that their health matters and being fit is an important element of it.

consciousness 是名词，来自形容词 conscious（有意识的、清醒的），加上名词后缀 -ness 构成。consciousness 在这里指"意识、认知"，表示对某事物的清醒认识和觉察。