What kind of cardio do you recommend doing it in HOUSE concentrating on abs? I dont have the time to go out from the house, still a student.
That's not an excuse.
HIIT is a good form of cardio and it doesn't take all day either. There is no such thing as spot reduction, so doing a thousand sit-ups a day won't necessarily get rid of all the fat covering your abs, but it'll definitely wear you out and possibly give you a sore back. You need cardio, like it or not, to burn fat. Replace the sit-ups with crunches and add in planks to your ab routines as well.
I thought sit up is more intensive than crunches? But why crunches are better and how many times of crunches per day?
P.s: I dont know if this problem is related to this topic but how do i get rid of the light and dark spots on my body caused by bathing after sweating ?