Swimming for 2 hours consumes 804 calories;
According to your age of 20, male, 170cm, 50kg, the calorie consumption of basal metabolism should be 139 1 kcal;
That is, you will consume 804+1391-232 =1963 calories a day.
Heat generated by fat = 9 kcal/g
10 day will consume 19630 kcal = 2181g = 4.36kg.
10 It is unhealthy to lose more than 4 kg a day, which is very harmful to the body, and it is easy to rebound and not easy to persist.
Research shows that it is normal for people to lose 2-4 kilograms a month on average.
I hope you will change your slimming method quickly, otherwise the consequences will be unimaginable!
Also, I'm a nutritionist!