First of all I would like to say I did 1 full round of P90x and insanity workout and have gotten great results with both programs. Insanity and P90x are both from the company Beachbody. Beachbody programs always come with great customer support( 30 day money back return policy) and reliable and prompt shipping. Both arrive in nice boxes that contain fitness guides nutrition guides the DVD workouts and calendars to mark off your daily completion. But Insanity's fitness guide is a small pamphlet getting right to the basics( they say in the infomercial they want us working out not reading). The P90x fitness guide has a lot of pages. P90x is a 90 day in house boot camp system that promises great results in 90 days it has 12 workout routines and is based on Muscle Confusion- Basically saying doing 6-7( day 7 is X-Stretch or Rest) different workouts during the week so you don't hit a plateau and stop seeing results.YOU MUS HAVE A PULL UP BAR OR SOME WAY OF DOING PULL UPS OR CHIN UPS.Perform the p90x fit test see if P90x is right for you.The P90x fit test is 8 routines measured by reps in a specific time( use modifications at will). 90x is broken down into 3 phases or months. The first 3 weeks of these phases you will complete the same 6-7 exercises throughout the week but on the last week of the month is called the recovery phase where you are introduced to a new full week of exercises that allow your body to rest from the resistance training and have cardio and ab focuses workouts throughout this week. This week is no joke!! Here are the workouts for P90X: # Chest & Back ( Weight/ Resistance Training) # Plyometrics (Cardio) # Shoulders & Arms (Weight /Resistance Training) # Yoga X ( Flexibilty and Stability) # Legs & Back ( Weight /Resistance Training) # Kenpo X (Cardio) All works range from (45-60 minutes) # Chest, Shoulders & Triceps (Weight/Resistance Training) Except Yoga X (96 minutes) # Back & Biceps(Weight/Resistance Training Except Ab Ripper X (16 minutes) # Core Synergistics ( Cardio and Core) # X Stretch ( Flexibility) # Cardio X ( Cardio and Core and Flexibilty) # Ab Ripper X (Ab Routine) In the second phase of P90x they introduce 2 new workouts into the 6-7 workouts and remove 2 so you still are doing 6-7 workouts weekly. This allows more muscle confusion to take place on the resistance training days due to the 2 new resistance workouts. They are awesome too. New moves and harder than phase one!! 3 weeks of this again then the same recovery week. The last phase is the best this is when the true muscle confusion kicks in! Every weeks are swapped back and forth to continuously trick your body through different exercises. For instance: What you did for week 1 you will do for (Month 1) weeks 1 and week 3 and what you did for (Month 2) week 1 happens in the 2nd week then back to week 1 of the first month and son and so forth. (weeks 1,week 5 week 1 week 5 then the great recovery week). Shaun T's Insanity is a home based Cardio) workout that promises and total body transformation in 63 day The Insanity Deluxe system has 12 Dvds also( base kit has 9).The Insanity system is based on Max Interval Training-Basically bringing your heart rate up high for long periods of time and having minimal rest periods(about 30-60 seconds). This is the hardest workout ever put on DVD! I can honestly say the infomercial was right!You also perform Fit tests throughout Insanity (5 times) to track your progress. It really is amazing to see where you are after 63 days! Insanity is broken down into 3 Segments. 1st segment or month you will rotate 5 workouts(working out 6 days a week there is no 7 day workout! You will be praying for the rest day, lol. About 35 minutes a day for month 1 workouts. 2nd Segment you have your recovery week basically they want you to use Core Cardio and Balance for 6 days. I just switched between Core Cardio and Balance and Max Interval Sports Training to get me ready for the Maxed out month 2 workouts. 3rd Segment month 2 Things really get tough for the last month at this point the workouts are about 25 (45-60 min for month 2 exercises) minutes longer so eat more healthy foods! New workouts and New moves you are gonna love it! 1: Dig Deeper & Fit Test: To start, Shaun T will put your body to the test and see what you're made of. 2: Plyometric Cardio Circuit: Burn fat with intervals of intense lower-body plyo and sweat-inducing cardio. 3: Cardio Power & Resistance: Build lean muscle and upper-body definition with strength-training and insanity workout power moves. 4: Cardio Recovery: Shaun T goes easier on you once a week so you're ready for the next Insanity Workout round. 5: Pure Cardio: Skip the intervals this nonstop cardio workout is all extreme. 6: Cardio Abs: Do explosive intervals of cardio and core moves for rock-hard abs. 7: Core Cardio & Balance: Take a break after month 1 of the Insanity workout and gear up for month 2 with this workout. 8: Max Interval Circuit: The interval circuit that's more intense than anything you've ever done before. 9: Max Interval Plyo: Push your legs until they beg for mercy with power and plyo, all at your MAX. 10: Max Cardio Conditioning Abs: Get pushed to your limit with this extreme cardio workout. 11: Insane Abs: is nothing but insane ab cutting movements that will really define your core! 12: Max Interval Sports Training: Is a Fun workout doing various sport drills like boxing, basketball, football, and gymnastics. Upper Body Weight Training: not your regular weight lifting. This is a bonus DVD they say Shaun T likes to Lift weights once and in a while. With all this said: P90x will get you in the best shape of your life with various workouts with Weight Training and Cardio and Flexibility in 90 days.( I lost 47 pounds with p90x).Tony Horton will keep you laughing and motivated through out the whole 90 days. Shaun T's Insanity will get you in the best condition of your life with your own body weight and the will to survive. You will do lots of different pull ups and jump moves that will really tighten and enforce your entire body.Insanity also has Stretching that really works deep in the muscles. If you have any weak lower body parts like legs knees lower back Insanity might not be a good choice for you due to all the jumping. Also You shouldn't jump right into trying Shaun T's Insanity build a strong fitness foundation before attempting Insanity. Use very good Running shoes with Insanity to protect your joints and joint support.