Summer is a good season to lose weight, because the weather is hot, people sweat more, metabolism faster, body fat is not easy to accumulate. If we use some effective ways to lose weight and keep fit properly, people who want to be slim and beautiful will not be disappointed. But in the high temperature weather in summer, the body's own heat consumption is very large, so if you can't grasp the amount of exercise, it will easily lead to low blood sugar, resistance decline, light dizziness, serious will also lead to fainting, so the summer fitness must grasp the appropriate method, otherwise things will go against each other. Summer weather is relatively hot, especially in the process of fitness, it is very easy to heatstroke. Therefore, the best time to exercise is in the morning and evening. Avoid exercising outdoors during the hot period from 11:00 to 4:00 a.m. in the daytime, when the sun is strongest, and at the same time, it will directly damage people's skin. Outdoor fitness exercise time should not be too long, it is best not to exceed 40-50 minutes each time. Thirdly, in summer, the physical energy consumption is relatively high, which is easy to cause harm to the body. Therefore, we should do proper warm-up training before exercise, and increase the amount of exercise one by one after the muscle activity in all parts of the body. At the end of the exercise, we should do some relaxation adjustment activities, such as slow walking and deep breathing. However, the time of summer outdoor exercise should be in the early morning, during which the outdoor air quality is good, but outdoor fitness should know the PM value of the day, the highest concentration of PM2.5 in the air period, usually 8 to 10, 17 to 20 o'clock every day. Generally speaking, around 3 p.m. is the best time of day for air quality, but also when the outdoor temperature is high in summer, it is not suitable for outdoor sports. Most people will choose indoor fitness, such as gymnasium is a good choice, but should choose a relatively professional, large-scale gymnasium, because more people exercise in summer, many fitness equipment are occupied by others. In fact, the best choice is to buy a treadmill at home, or other fitness equipment, every night to carry out appropriate fitness exercise, the effect should be good.