Swimming loses weight quickly. My sister swims three times a week for a month. A month from 102 to 92. Her weight base is very small, so she can lose weight so quickly. Your weight base is bigger than hers, so you will lose weight faster than her. Pay attention to your diet when swimming. Eat three meals a day as usual. But don't eat fried and puffed food. And eat less sweets. Eat less. Don't eat too much at every meal. Try to have dinner early. Try to finish eating before 6 o'clock.