Heavy periods - most common are four sets of eight repetitions
, but you can go down to four sets, where you just cope three repetitions. That is really heavy. During the lighter periods - most common are three sets of ten repetitions. You can add a class similar to "body pump" during the easier weeks, if you'd like. In those classes you might get up to 100 repetitions per set and muscle group, which is really good endurance training.