With a lower level of hormones during the first phase of your menstrual cycle, your body is primed to maximize hard training efforts. This means your body is.
A girl can normally go up to 6 months between the first and second periods. Also, a girl can go up to 4 months between the second and third periods. Normal.
We are not certain why exercise is helpful for PMS but studies demonstrate that exercise can release 'happy' hormones such as serotonin and endorphins.
Know more about how your period affects athletic performance and how you can adjust your training and diet to work with, not against, your menstrual cycle.
If you bottle-feed, your first period after baby may happen as soon as a month after delivery, but should happen within 2 to 3 months. If you breastfeed.