Only 8 minutes of these crunches will replace an exercise of 45 minutes!
This training is not easy to stand, but it is not 5 times harder than a whole training. The most important thing for this training is, if you persevere it, you will have six pack for sure!
If you can’t hold up 8 minutes for the first time, you will have to gain condition and you will have to train a bit. The video lasts just like the exercise, which is specially designed for those who don’t have time for the whole training, and they want to have six pack.