Regular exercise can help regulate the hormonal balance in the body, which can help promote more regular menstrual cycles. This is because exercise can help reduce stress, improve insulin sensitivity, and maintain a healthy weight, all of which can have an impact on menstrual cycle regularity. However, the degree to which exercise affects the menstrual cycle may vary from person to person.
As for reducing period flow, while exercise can help improve overall health and circulation, there is no scientific evidence to suggest that exercise can directly reduce menstrual flow. However, staying active and maintaining a healthy lifestyle can improve menstrual health overall.
Remember that everyone's body is different, and what works for one person may not work for you. If you have concerns about your menstrual cycle or period flow, it's always a good idea to speak with your doctor.