Generally supersetting is considered to be when working the same area(s), otherwise it is more similar to circuit training. It's semantics and in all honesty the names mean nothing if you are training well.
In order to prove myself beyond stupid recently I decided to do limited circuits with aim of no rest and reality of very little, it was great for showing how fast you can do a workout and feel dead.
Weight loss is a simple sum with loads of complications.
Simple sum is energy intake < energy output = fat loss, and if you think it's that simple you are in for one heck of a shock.
Weight loss is generally a way of saying fat loss, so people become slaves to the scales seeing high losses as great and small gains as depressing. Fat is not very dense, so a pound of it looks huge compared to a pound of muscle or water, unfortunately water levels in the body fluctuate massively so a constant pound a week fat loss can show on the scales as weight gain or loss dependant on water. Then we add lean mass gain, Goldfish posted some pictures of a woman he'd trained who gained 10kg (22 pounds) over a long period, she looked the same size but in better condition, because she had lost fat and gained muscle.
Fat burns slowly and has a lot of energy contained within, set light to a pound of fat in safe conditions and see how much heat it generates, 3,500 calories to be exact. Considering the average person requires this to survive 2 days and suddenly losing a pound of fat a week seems less disappointing and more incredible, in fact 2 pounds a week is the maximum to aim for over a long duration. When you have someone telling you they lost 7 pounds in a week as if this is all fat it can be deflating to ask them if they really think they burned 3,500 calories a day more than they burned, but it is helpful when the following week they gain some back and realise that 6 pounds were water and they had used 500 calories a day more than they ate which is brilliant and safe. Normal thing I say to people when they lose big one week is have a realistic look at how they have done that week and attribute a realistic amount to water, this means the following week they are not upset and could even be pleasantly surprised.
Consider what energy you really are burning. I am around 13.5 stones and carrying that 5.4 miles burns around 740-750 calories, for easy math going to say 750. 3,000 calories is 4 times that so to burn less than the 1 pound of excess a day I would need to carry my weight 21.6 miles every day or equivalent.
Genetic preferences. I am naturally a marathon running ectomorph, scrawny runt in English, so for me gaining weight is hard work, and losing it is best done via activities like running or other stamina activities that I can maintain at high intensity for absurd durations, burning masses of energy. Of course that was 4.5 stones ago, I don't run marathons anymore. Someone who is more powerful by nature would likely not be able to keep up the pace I can pounding tarmac, so while I burn 750 calories they might be managing 250 or less due to lower pace and possibly bodyweight. The same person could be far better at shifting iron than I am and be able to keep up intensities I aspire to for times I go green with envy thinking about, so for them pushing iron is the obvious choice and they will burn more energy doing this and recovering from it than I will.
I give the generic variation advice to everyone, because it's generic and works for everyone, but if you can tailor it to your personal strengths you will do incredible things.
