The Activities graph in its current state is a little confusing. For one the color for workouts on the graph is green when they are represented as blue in the calendar and cardio is blue in the graph but green in the calendar. More importantly it's odd that the "workout graph" is a graph of ALL exercises performed regardless if it was cardio or a planned workout yet there is a separate graph just representing cardio. It would make more sense to have 1 line for workouts (blue) and 1 for cardio (green) so that each type of activity can be clearly represented better.