Joe Weider has been branded as the father of modern bodybuilder similar to how Lou Ferrigno has been branded as the incredible hulk.
Weider’s principle of giants sets have been used by giants like Ferrigno who used giants sets in the off-season performing four or more exercises back-to-back without taking any rest.
Giants sets are a high intensity technique that can be applied to a workout in many ways. Any combination of exercises can be performed back-to-back to create a giant set.
In practice giants sets are typically used to train a specific area such as upper body, lower body, shoulders, arms, or abdominal muscles. The exercises chosen and the order they are performed in doesn’t matter. For example, if doing a giant set for your chest your might start with isolation exercise like the dumbbell flyes first and finish with presses.
The next workout you might want to reverse order or switch in different exercises. The combinations don’t matter. What is important is that you are able to complete the entire giant set without stopping, rest for 2 to 3 minutes, and then repeat 3 or 4 times.