I am unsure how many people have used towing methods for over speed but my experience is that it can enhance foot strike and hip height ability. When done in a contrast settings with sled and unassisted sprinting the results can be excellent. I find 3-4 sessions leading into taper or pre comp is great. Also for individuals who are strong but lack frequency the patterning of greater frequency can help. The only time issues with over striding come into play is if the towing is to fast or the athlete is not confident to go with the speed. This is the job then of the coach to adjust and or cue the athlete. If you video tape the session the feedback and changes to hip height can be compared to the unassisted runs. Like any tool it’s only effective if the individual implementing it knows what they from it and how to use it to get the desired result.