I tried this and it’s actually harder than you might think, but 30 seconds should be long enough. When you get the technique it’s pretty simply. If you find it hard to do this, then in all actuality you are pretty close to a six pack anyway.
I tried this and it’s actually harder than you might think, but 30 seconds should be long enough. When you get the technique it’s pretty simply. If you find it hard to do this, then in all actuality you are pretty close to a six pack anyway.