1, insist on aerobic exercise, such as jogging and swimming. Usually more than 30 minutes. But I suggest you practice jogging in this weather.
Aerobic exercise can help you consume excess fat in your body.
2, muscles are not what you want to practice, and the formation of muscles is not as simple as you think.
The muscle you are talking about may be that kind of hard meat. This kind of situation will not happen as long as you do enough warm-up and stretching after exercise! Specific time and action, search online, there will be many!
3, the diet needs to be properly controlled, so it is better to eat 60%-80% at ordinary times, but don't diet, but remember to eat breakfast!
If you choose to exercise to lose weight, you must pay attention to the second one!