Girdle, belly binding

well... I have no idea but I don't see how it could hurt and if it worked after C-sections there is a good chance it will at the very least help now especially with exercise.

Not to sound totally ignorant, but how does one go about doing this exactly? O.o

You can corset train

my friend is doing it, not post baby or anything, she doesn't want to watch calories, took her two days to get into it, liiterally, she watched utube videos to see how to hook it, she is wearing it to bed and basically all day long, said she is standing up more "straight", she can't eat much because it is so tight, she likes that she "looks like I lost 10 lbs instantly", but it is very restrictive....hmm.... told her about MFP, we'll see, this is my friend, she does all fad diets, and eventually fails, so "waist training", probably a scam as well.

I also have a abdominal diastasis recti. I've had a baby. A very BIG 9 pound baby in my 5 foot 3 petite frame so as you can imagine my lower floating ribs were widened giving me a bigger waist than what I had prior to baby as well as a huge gap where the abdominal muscles have split.

No matter how much strength training or safe core workouts I did I never got that natural curve back. But since waist training with a proper fitted steel boned corset I am slowly pushing my floating rib cage back in and shifting fat back to where it should be.

Combined waist training with a healthy balanced diet and exercise will work however corsets alone don't make you lose weight...but if done correctly you will get a smaller waist over time because it is repositioning your fat. Now...if you have a low body fat percentage corset training will take a lot longer for you because there is not much fat to move but it will still push your floating ribs in giving you the appearance of a smaller waist.

Corsets if done correctly also don't make you breathless and don't cause damage to organs. (Unless you're a serious tight lacer) If it does you're doing it wrong.
I had to mention that because Corsets have this ridiculous stigma against them which simply is not true.

Once I figure out how to post photos I will show you my results.

Worked for Lady Gaga

I wear a corset as well hidden underwear. I'm almost 50 and, back in the day, used to have the classic 36-22-36 figure. What with one thing and another those figures have all exploded of course. I find the corset does make me think about what I want to eat as I do wear mine rather tightly and it does mean that I do not have the same appetite, nor can I eat as much as I might otherwise. It does feel wonderful when I see that lovely hourglass in the mirror. I match that with non traditional, supervised, workouts of no more than 1 hour three times a week in the gym. Rather than lifting weights and hitting the machines as I used to do - and got nowhere!!! - I'm doing what I think is called a transversal routine. This focusses on the core - all around the belly and the back - while using the three planes of movement for each exercise. It doesn't feel like much when I'm doing it but I really feel it the next day. One of the problems I had with the corset was that, with my capacity for food constrained, I started craving high calorie value foods and, of course, made the mistake of eating very little during the day and then eating voraciously at night as soon as I took my corset off. I've adjusted that now so that I eat a healthy variety of more foods during the day in small meals and keep my corset on until I feel satisfied after dinner. If you want to try this, make sure you focus on the core exercises. The corset extends the spine and, unless you engage your core muscles all the time, you can end up with atrophy in that area - hardly what any of us is looking for.