What would be the downsides of just doing p90x and insanity for

>>42875659
Return of investment goes down over period of time.
Joints get smashed
Body adopts to the movements.
Will enter gymnastic body/dyel/otter mode.

If your goal is to have a healthy cardio system and well rounded like a military soldier then by all means do it. For the typical bulky bodybuilder its utter shit.

>>42875725
>If your goal is to have a healthy cardio system and well rounded like a military soldier then by all means do it
Alright, that's what my goal is for now. Might replace the insanity with something else eventually to spare my joints though

>>42875801
Yea shit is ruff compared to P90x on them. I did all of x3 but bailed a few weeks in on Insanity because of it.

If you need something to fill that void then swim, jump rope, or learn HIT tactics.