These drinks are calorie free, which technically should help people lose weight and prevent sugar-related diseases like metabolic syndrome and diabetes. However, the evidence for these beverages having any use is completely nonexistent.
The classic approach to performing supersets is to work two opposing muscle groups back to back without any rest between sets. This technique is usually applied to antagonistic muscle groups such as biceps and triceps, chest and back, quads and hamstrings. An example of a superset would be one set of biceps curls immediately followed by a set of triceps pushdowns.
Human Kinetics suggests varying the muscle group you start each super set with so that each one has the opportunity to start fresh. In the example of a biceps and triceps workout, do a few sets starting with a biceps exercise, and do a few starting with a triceps exercise. The American Council of Sports Medicine recommends doing three sets of each superset for eight to 12 repetitions for optimal strength gains.