Running every morning will definitely make you thinner and healthier. But it will take a little time, don't worry.

Running 120 minutes in the morning is enough. If the time is long, you can consider running for a while.

Sit-ups are very effective for people with a bad stomach. I did it every day for a while, and it was very effective. I didn't rebound after I didn't do it, but I insisted on doing it. This is partial weight loss.