Do sit-ups every day, one is routine, don't do it too fast, do it for ten minutes.
One is to stretch your legs and bend over, 10 minutes.
Then lie flat and lift your legs, 10 minutes.
If you want to lose weight, you must ensure that it is aerobic exercise, you don't need to do too much, and the movements don't need to be great, but you must ensure that the number is enough.