Is it just me or do freestyle intervals with athletes choice on effort and duration seem to be the ultimate cop-out for coaches who cant be bothered to create structured workouts? I mean, shouldnt the point of interval training be to push athletes to their limits in a controlled and measurable way, rather than just letting them wing it and hope for the best? And whats the point of even calling it interval training if the athlete is just going to decide for themselves how hard and long they want to go? It seems to me that this approach is more likely to lead to inconsistent and inefficient training, rather than actual improvement. Am I missing something here, or is this just a case of coaches taking the easy way out?