Well I have been doing P90X for 30 days now and it feels good! This week I am feeling sore from the new moves we started which gets me excited! I started using a 25lb plate in a back pack to give me added resistance on my pull-up exercises. This week I also started trying to use heavier weights and tryed to lower my repetitions on all of the exercises. Well I have been doing P90X for 30 days now and it feels good! This week I am feeling sore from the new moves we started which gets me excited! I started using a 25lb plate in a back pack to give me added resistance on my pull-up exercises. This week I also started trying to use heavier weights and tryed to lower my repetitions on all of the exercises.