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Running with P90X

Lately, I’ve been getting quite a few questions about whether or not running and p90x mix. I understand that a lot of people going through P90X also want to run marathons, and their concern is that the running will hurt their results with the program. Is this a legitimate concern? What about just adding in running with P90X for quicker results?

It’s actually quite possible for you to both train for marathons and still do P90X, but it involves some adjustments to the diet. When training for marathons, people run an average of about 3-5 miles per day, in which they can easily burn a thousand calories or even more. Since you will already be burning close to a 1,000 cals with the P90X workouts, it’s going to be very important to increase the amount of calories you consume throughout the day by about 1,000. It’s also going to be important for you to increase the amount of complex carbs you consume as well. If you don’t, you can easily lose any of the muscle that you have gained with P90X or before P90X. The reason being is because when the body doesn’t have any carbs to burn, it targets muscle and fat. If you already have a low body fat %, then mostly muscle will be targeted for energy. You also don’t want to overtrain, which can easily happen if you don’t take in enough calories! Last, it’s going to be extremely important to take in the proper recovery after each workout, including the running, and for that I highly recommend the P90X Recovery Drink. It is the best post workout supplement that I have come across.

What about running with P90X to get quicker results? When I was on my 3rd round of P90X, I experimented with running every day along with P90X, and found that I hit a plateau very quickly and couldn’t seem to get out of it. This lasted for 3 weeks until I stopped running completely. At that point, I got beyond my plateau and continued seeing results. The reason for my plateau was because I wasn’t eating properly nor taking in the right pre and post workout supplements. My problem was that I continued the same diet, even though I was doing an extra workout. If I would have made the proper adjustments, then I wouldn’t have hit a plateau. If you are going to run along with P90X, don’t do it every day, but only on resistance days. I recommend running early and then doing the P90X workout later in the day. Remember, if you do Doubles, it’s important for you to adjust your diet accordingly! And don’t forget about the proper pre and post workout supplements! Before you run, take in some simple carbs as well, and for that I recommend 8 oz. of natural fruit juice.

Interested in learning more about P90X? Check out my P90X Review!

Josh Spencer


  1. This couldn’t have come at a more perfect time because I just decided to do a run with my workouts today. Thanks for the info Josh, you are a big inspiration to me and I check your site at least 2 times a week.

  2. I’m glad the posts help man!

  3. malik /


    I have registered you as my coach.

    I started my 5th week of P90x this week and i decided to combine the Insanity program with it. I am sticking to the resistance workout of p90x, however adding the Insanity’s cardio workouts on my other days, along with subtituting ARX with Cardio Abs.

    Since i am still around 16% body fat, should i adjust my diet in any way. So far this week i have continuted by Phase 1 diet, 20/30/50 F/C/P. with similar about of calories, around 2000.

    btw i am 5-10 about 163lbs.


  4. Josh /

    Stick with 2,000 cals or so until you drop lower in body fat.

  5. Eric /

    Hey Coach,

    You talk about simple carbs, what are some exmaples of those…?

    You also talk about complex carbs, what are those ?

    And one other question. You always seem to have a tablespoon of Peanut Butter with some meals, why? Isn’t it fatty? what’s the gain from PB?


  6. Josh /

    You can learn more about simple and complex carbs in the “Nutrition” section of this site. Also, I only have about 1TBS of PB per day, so I don’t have it with every meal. It’s high in fat, so it’s important that you don’t go overboard with it.

  7. I am currently about 6′, 200 lbs. I have a good workout room at home to do the p90x workout in the morning. However, I will shortly be working split shifts and will have downtime between about noon and 3:30. I was thinking about joining a gym close to work and doing cardio on the resistance training days to speed up my fat loss. I am probably about 15% fat, and I want to shed the fat without losing muscle. There is not a place at that gym close to work to do workout videos. Wouldn’t eating more carbs just cancel out the additional cardio?

  8. @Mark. No, it wouldn’t, as long as they are healthy carbs. If you don’t increase the calories and carbs when doing Doubles, then you risk going into starvation mode and will make it near impossible for you to build any muscle.

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