I was looking today and I saw that there is a device to train abs without exercising. I'd like to know if should I buy something like this to strengthen and define my abs? I have a normal body fat value with little visible abs. Is a good idea to buy this? I am just sitting in a chair and this is doing like "massage", will this help to define my abs?
Exercise Rule #1
If you're not moving your not exercising!
This is also called the Rule of Inertia
When was the last time you sat in a chair, strapped a machine to yourself and then magically received a Million dollars...?
If recently, then yes I highly recommend you buy the device.
Otherwise despite what anyone trying to sell you something might say, Rule #1 holds true.
There is no mythical device that can lower your belly fat and give you killer abs (or a million dollars).
Instead invest your money in a competent personal trainer or home video workout program. (My suggestion as a competent personal trainer would be the AthleanX Programs)