Have the option to assign a workout a type (such as "Cardio", "Strength", "Flexibility")
As others have noted, the ability to add and support cardio workouts and flexibility sessions seems to be lacking. I work with a lot of runners and create cardio workouts for them, but because of the way the system is set up I have to create an interval session or tempo run as a standard workout, which means it doesn't show up on the calendar or get counted as a cardio workout. It would be great if the system gave you the option so assign a workout a category such as "Strength" or "Cardio" or "Flexibility". Each category could have an assigned color, much like the body stats and workout do currently. This would give more flexibility to the trainer, communicate to the client more accurately what the workout is, and allow for more accurate tracking of workouts. Right now I have several half marathon runners who show very few completed cardio sessions because many of their cardio workouts get recorded under the ambiguous "workout" category.