The exercises illustrated in the training programs are what we believe are the most effective positions and angles to train the respective muscle groups. Certainly, you may train the muscle groups at other positions and angles that you feel may be beneficial. The best mindset to have when performing these and other exercises is to look for positions where your muscles are the weakest during a particular exercise and work towards increasing your strength in these positions. This will greatly help with your coordination and speed.
The best way to know if you are effectively training a muscle is if the muscle(s) begin to shake after a few seconds when holding it in the final position. This is a sign of muscle weakness and lack of coordination with these muscle groups. It is also a sign that there should be a huge upside to improving your speed and quickness as a result of doing this training exercise.
