What is Agility?
To use agility as an effective training tool, you have to understand what agility is, how it works, and what is needed to get it working. Agility is the process of being able to maneuver, in the correct manner, in a certain direction. The agility training you can do in your home or at the gym has more in common with the "high-intensity" type of training you do in the Army than it does with a more aerobic-based exercise. The idea behind high-intensity is that you use a high-intensity pace to get the muscles of the body working to the maximum possible intensity, then you slow down and focus on maintaining that intensity. This type of training can have serious negative effects on athletic performance in the short-term. It can also be extremely expensive.
It takes more effort than you think to move. It takes less effort to maintain a slow, steady speed. I've known many people who've spent their whole life trying to get fit for one sport and never get to where they want to go on the field because they couldn't keep up with the pace they were using. In fact, it's important to keep your pace under control for one thing: You will never be able to keep the pace up for more than a few seconds at a time.