Sit-ups and standing against the wall can strengthen the muscles of the waist and abdomen and lower limbs, but the calories consumed by these two kinds of exercises are not very large. If you practice more, you can also achieve a certain weight loss effect.
If you practice jogging for 30 minutes at a time, you might as well do some high-intensity exercise. For example, the opening jump, do 4 groups, 30 to 40 times each time; Standing brace, 4 groups, each group is about15; Run with your legs up, 4 groups, 40 seconds each. Other exercises are adjusted according to your own situation.
In addition to scientific and continuous exercise, you need to strictly control your eating habits. Eat more fruits and vegetables and reduce calorie intake. Mainly eat less food with high fat and sugar content.