Hi Gus. I would add to what Joanne has said above. I work with a lot of athletes, and I agree with her comment that this type of training is not for everyone. I like it because it also helps my client to ensure a certain degree of symmetry in that when used to work opposing muscle groups, it’s a way to help balance-out their training. I ALWAYS use a symmetrical approach to training when I’m working with a client, however, unfortunately our clients may not always do this themselves unless instructed to do so. How many times do we see the guy (just an example) who does tons of bench press or bicep curls, but ignores their back or triceps. When working with my female athlete clients for example, this is extremely important in making sure that we address any posterior chain strength discrepancies such as a weaker hamstring to quad strength ratio.
I hope this helps.