In summer, nothing is more economical than swimming, and it kills two birds with one stone. It's so hot that it feels great to jump into the water. The data shows that the thermal conductivity of water is 26 times that of air. If heat dissipation in water at the same temperature is more than 20 times faster than in air, it will effectively consume people's heat. The test shows that swimming in water 100 meters consumes heat energy 100 calories, which is equivalent to running 400 meters on land, riding a bike 1000 meters, or skating 1500 meters.

Second, mountain climbing: the effect of weight loss by mountain climbing in summer is remarkable. The city is sunny and sweltering. Go to the suburbs, where the temperature is at least two degrees lower, plus rich vegetation, fresh air, and the mood becomes very happy. Climbing a mountain in hot weather will increase physical exertion by about 20%-30%. Experts say that "the best way to lose weight is aerobic exercise, and mountain climbing is the best aerobic exercise". Every time you climb a mountain to get ready for a rest, take a watch and measure it: the heartbeat is 120 per minute, which can last for 10 minutes, indicating that exercise has achieved the purpose of burning fat. Third, take a walk and so on