There are several reasons whey speed tends to breakdown in sports.
The first and major reason is the internal communication between your mind and body isn't working properly and this creates two scenarios:
1. It will create tension and nervousness that will prevent athletes from controlling their speed.
2. Or there is a so-called electrical short that prevents the natural flow of information from going naturally from your mind to your body.
Either way it will prevent you form having the control over your speed and this is what will break down the speed in your movements, techniques and in your training and performance.
So what causes this so-called electrical short that prevents the natural flow of communication form going from the mind and body?
I don't really know why it happens at a 100% level but what I do know is I can solve the problem.
Now how can I accomplish that? Well it's simple now but it took over 16 years of research and thousands of experiments to finally crack the code on speed training.
In seminars athletes will ask why the speed breaks down in their sport and my response is: It took me over 16 years to solve this speed problem and I don't want to take another 16 years to figure out why it happened.
But I have a theory that I will share with you...
On the days when you're training and performance and speed is working properly, then you're experiencing what I call an ON day where you're in the ZONE or FLOW. In those days it doesn't matter what you do, everything seems to work perfectly for you.
When you're experiencing this ON day or ZONE or FLOW you'll experience a sense of void in your mind that seems to calm everything and lets the communication between your mind and body to work at a 100% level.
The days when you can't seem to do anything right in your training you are experiencing an OFF day and during that state you won't be able to be in the ZONE or FLOW. It will be a hit or miss situation with no control.
So it's really either nervousness, tension or a so-called electrical short that will prevent you from achieving and maintaining the proper level of speed in your sport.