As for your question (1), because your leg muscles are well developed, jogging will not increase the leg muscles, but will consume the whole body, especially the leg fat. It is unscientific to stretch muscle fibers after full stretching, but it has been proved that stretching muscles after exercise will make them look better. )

You can practice your abdominal muscles before running. Because the initial exercise is within 20 -30 minutes, it consumes glycogen (liver glycogen and muscle glycogen) in the body. Consume fat after 30 minutes, and gradually start to consume muscle after 1 hour. Therefore, it is better to start exercising from other exercises such as abdominal muscles and consume glycogen, so that all jogging time is spent on consuming fat.

Question 2: Last summer, I stretched my thighs by jogging for a little more than a week (less than 10 days), and my latitude dropped by about 4 cm. The weight has also dropped to 10 kg. I felt that the body fat content was relatively low, so I didn't continue to lose it. Because, I like to gain weight in winter and lose weight in summer. As for how to maintain it, I can't say. (However, shopping with your wife and girlfriend for several hours at a time is the best way to reduce your legs, haha! )

I hope I can help you!