Hello, dear, the breaststroke is 1000m, which is equivalent to running 4000m m. Because the thermal conductivity of water is 26 times greater than that of air, the heat dissipation rate of water is more than 20 times faster than that of air at the same temperature. This will effectively consume human body heat. Sports physiologists' tests show that swimming in water consumes 100 calories, which is equivalent to running 400 meters on land, riding a bike 1000 meters, or skating 1500 meters, which is why you feel hungry soon after swimming.