Full body workout
Any exercise for most people is enough. Whether you don't have enough time for any more, or you simply can't take any more.
Cross Fit training, however, is quite different. There is never enough. With a range of equipment, drills and activities based on exercising the whole body, it really is extremely thorough.
Spending a while at a session in south London, I documented some of the many disciplines the athletes cover during their multiple-activity workouts.