Oh, I just want to share with you about FIT Bodywrap article and it give you better explaination.
http://blog.fitbodywrap.com/how-often-can-you-do-infrared-sessions?utm_source=hs_email&utm_medium=email&utm_content=50093161&_hsenc=p2ANqtz--VnDiUfgCwoXbfIRB3A5UzPomD6Fl9GQG059FcM_v1bn_zDZDq8aDA6wvpPvCeqBKkDTExhavCZXYpO0pdxINpnaXqgQ&_hsmi=50093161