i'm a girl, 19 years old, 5'4, i'm not sure how much I weigh but I guess i'm about 125-130 lbs. I'm on my 4th week of insanity and I start recovery week next week. I know i've gotten a bit of muscle definition, but I have not burnt any fat at all, which is what I really want. I don't follow the meal plan because i'm in college and it's impossible, but I eat VERY clean (vegetarian, NO fast food, mainly only fruits and vegetables, only water to drink, I barely even have a cheat meal, the whole deal). so how long do you think until I start burning off fat finally? and how long did it take you to start noticing results?
Losing fat isn't all about exercising, diet will always be king. I'm also worried that you aren't getting enough protein in your diet since you're a vegetarian. Check your diet, count calories everyday, know how much you should be eating. I don't want to be too technical, but for your height and weight you should be eating around 1000-1500 calories to lose weight. This is a rough estimate, you can go on google and search for BMR calculators, if you want to make sure. Insanity was pretty intense from what I remembered. I stopped after 1 month, I wasn't satisfied with the results, but many people had results so don't get discouraged. Best of luck, make sure you count your calories!!!
Muscle definition is fat loss... You sure aren't gaining muscle with insanity so you have lost fat.