Over the course of several workout cycles, you want to include all the main movements and positioning. (fitness-baron.com)
Each 60 - minute class requires members to wear heart - rate monitors, allowing them to track their heart rate through various workout cycles. (chicagoparent.com)
Kind of like doing workout cycles - where you always change your routines to prevent your muscles from getting used to the exercises. (bodybuildingforyou.com)