The contracts are meant for you to exercise during half a year or during a full year. Since the attendance to in-studio classes can be once or twice per week, the plans are arranged in groups of 4 weeks. It’s done this way because each month has a different number of weeks in them, and therefore setting up a monthly plan with as many classes as weeks in it cannot be done in our current platform. The class allowance has to be fixed per cycle (eg, 4 per cycle, 8 per cycle…), and in the case of a nautral month cycle sometimes 4 classes would be needed and sometimes 5, depending on how many weeks that month has.
For a 12 month plan, the 52 weeks in a year are dividable by 4, and therefore there are 13 billing cycles. However, for the 6 month contract, 26 weeks is not dividable by 4, and hence we are using 24 weeks duration instead which is actually a bit less than 6 months, and it is therefore composed of 6 billing cycles of 4 weeks each, to keep the relationship of 6 months to 6 billing cycles.