P90 exercise routine

Yes, it is. Probably because it's an extremely scientifically designed exercise program. The reason for its effectiveness is that it avoids the plateau effect. Normally, when you do the same kind of exercises every day, your body sort of starts getting used to it. As a result, it stops responding to the exercises. That's why when you start weight loss exercises, you will notice that you first lose weight very quickly and then the weight loss tapers off. That's the plateau effect. But in P90, the exercise routine changes as your body changes. Therefore, your muscles are continuously challenged and you continue to lose weight.

Hi Abhishek,
P90 exercise is great if you do it, but I would recommend you build up to a point before starting that program as its quite intense. Your body should be fit enough to take this workout.