High intensity exercise such as speed work, interval training (high intensity to low intensity rotation), one-legged exercises, etc. should be performed at the beginning of your workouts when you are fresh. Your body's neuromuscular system is highly fatigue-prone at high intensities. Performing these exercises in a fatigued state will compromise what you are trying to accomplish. For example, if a coach had players doing speed work at the end of practice, general conditioning would probably be achieved rather than the desired increase in optimum speed development.
High intensity exercise such as speed work, interval training (high intensity to low intensity rotation), one-legged exercises, etc. should be performed at the beginning of your workouts when you are fresh. Your body's neuromuscular system is highly fatigue-prone at high intensities. Performing these exercises in a fatigued state will compromise what you are trying to accomplish. For example, if a coach had players doing speed work at the end of practice, general conditioning would probably be achieved rather than the desired increase in optimum speed development.