Right now, I'm working out each body part 1x a week. I feel that's not enough, but I feel 2x a week is too much. With the 4-day split, I've decided every 8 days I'll get each DVD 2x, the 9th will be an interval and the 10th will be a rest. I think a rest day every 10th day suits me better than one every 7th day.