A friend of mine introduced me to this a week a go. In my opinion, it's actually a very bad idea to do this once a day, let alone twice a day. I'm not aware if there's a schedule, any planned rest or anything, it said once a day. To do it for a better looking body is completely ridiculous as you can achieve this faster and more effective by spreading and timing workouts. Your body needs time to repair itself and this is the most important part of any exercise program. It's not about when you exercise, but when you don't. I learned this the hard way by overtraining and plateauing. To do it to release energy I'd recommend to really focuse on the release instead of an exercise program. You can do this through movement or exercise but it's best to put the attention to the body part you are releasing.

Hey I love Insanity. I don't do them everyday, but rather only 2-3x per week. It is not advised that you do two a day, but I'm sure you could if you have the energy. If you're dead set on doing two a day, I recommend trying one of the cardio/plyo routines in the AM, and then one of from the rest/cardio recovery DVDs in the PM and seeing how that goes.

Mike, I see that you are a workout beast! Just wanted to share some information with everyone about high intensity training that I found very interesting. It is long, but it is worth it I think. I did not purchase the program, but it gave me lots of food for thought, cuz I used to be all about the two-a-days...or three-a-days. Or a 2-3 hour workout. This made me start to think about streamlining.

Not intending to offend at all, I think it is great that you are so into exercise, and I love it as well.

http://www.systemsixeasyfatloss.com/ haha forgot to add the url.

im on my last day of week 2. i skip the cardio because i dont need it and replace it with some other stuff

put more intensity into one of the workouts and insure the intensity and frequency coincide with you current fitness level while putting yourself on track towards you goals. You'll get better results with one intense workout rather than spreading your effort out of 2 workouts. I think some would say if you have enough gas left in the tank to do two of these tough workouts in one day then you're not pushing yourself hard enough on the one.

do it once a day but with a weighted vest

More is NOT better.

1. it may be obvious but workouts make you hungrier thus you eat more calories (consciously or unconsciously) negating the effect.

2. any activity done with the sole goal of burning calories will not produce results due to point one, and activities do not burn that many calories, most stats on calories burned per hour include your resting 'burn' rate to inflate the figure.

3. Workouts of that nature i.e. a sustained moderate intensity, basically send your body into stress mode, flipping all kinds of bad switches like increased cortisol which will lead to muscle breakdown... http://www.marksdailyapple.com/case-against-cardio/#axzz2N3k4tWYL

4. loads of wear and tear on your joints, this is a real issue you need to take care of your body, also mass over training, increased rick of injury etc.

You want to focus on building lean mass, to improve your body. You will look fit and healthy if you do this, not skinny, stressed and weak. This is 80% diet. Don't be fooled by the super fit people on the covers of these things. Most people only know how to train themselves, their own genetics (a massive factor in exercise response). They probably have great genetics (which got them in that position) and almost any program would have worked for them.

To IMPROVE the way you look: two short intense strength workouts a week: large compounds movements, two sets per exercise, about 10 sets in total, slow controlled movements.The focus is short and intense, which sends the signal to your body to become fit and lean.

Example:

2 sets of push ups, pull ups, squats, dumbbell row, one set of crunches (all sets slow and controlled, taken to failure, in good form, one warm up set per exercise, 1 minute breaks)

Hope this helps.