Women who practice gymnastics or ballet are more likely to be affected, due to the high physical stress and energy expenditure associated with these activities at a professional level. Additionally, excessive stress in daily activities can alter the function of the hypothalamus and alter the production of hormones that regulate ovulation and menstruation. In most cases, amenorrhea caused by lifestyle factors, such as body weight or stress, is relieved and the regular cycle returns when the circumstances become more normalized.