Do 50 sit-ups and 20 push-ups every day. Beat the leg muscles for 5 minutes every day. No special effort is needed. After eating at around 7 o'clock every day, you can watch TV for 20 minutes while running and jogging.

To sum up, do 50 sit-ups and 20 push-ups every day, depending on your strength. If you can't stick to it, you don't have to do it, and 20 sit-ups are ok.

I don't know if this will work for you.