» Don't count on your period to burn more calories - here's why burning more calories on your period is mostly a myth Don't count on your period to burn more calories - here's why burning more calories on your period is mostly a myth Kelly Burch,Veronique TacheJan 15, 2021, 00:19 IST Research is still inconclusive on whether or not you burn more calories on your period.LukaTDB/ Getty Images A myth persists that people burn more calories during their period, but experts say the number of calories burned during menstruation is not significant. People may burn more calories in the luteal phase of their cycle, which is the time between ovulation and the start of your period.