At its core P90X is good ol 'weight lifting 101. Resistance training is the spark needed to grow lean mass. It is what we do before and after training that determines our results. So with this in mind I present you some tips on how you can use P90X to gain lean mass:
1. Eat more calories than you burn. Sounds simple right? Well it is provided your calories are good calories and not junk. Let's face it folks – we are what we eat! Feed your body quality fuel and it will thank you with some quality lean mass! Feed it junk and you will end up adding fat instead of lean mass.
2. Dial back on the cardio! We are working to gain lean mass so let's not make things more complicated by doing intense cardio! So while you are trying to gain I would replace those cardio workouts with LISS (Low Intensity Steady State Cardio). It will help with the fat gains and allow you to keep that lean mass you are working so hard to gain!
3. During the training training routines do the following:
a. Lift heavy as you can with each exercise! You want to stimulate not annihilate your muscles. Rep counts should be between 6-10 reps. If you can only get 6 reps stick with that weight next time and see if you can get 7 or even 8 reps. Keep going until you reach 10. Then you can up the weight. No need to add more weight when you can still do more work with more reps.
b. If possible, add a weighted vest to your pull-ups and push-ups. Your numbers may dramatically drop but that's the idea in the first place. More resistance = more work!
c. Crush your LEGS! They are some of the largest muscles on our bodies. Get that growth hormone circulating! Weighted vest, more weight on dumbbells. Anything you can do to destroy your legs
4. Supplementation – I do recommend trying to add some Creatine Monohydrate and some simple Branch Chain Amino acids while training. Scivation makes two great products: Creaform and Xtend. I use them in every one of my workouts.