What are the low-calorie foods for fitness?

Fruit:

Apple, pear, grapefruit, fig, sugarcane, canned peach, kiwi, kumquat, grape, mulberry, orange, peach, cherry,

Citrus, pineapple, loquat, apricot, lemon, plum, cantaloupe, watermelon, mango, strawberry, carambola, bayberry, cantaloupe,

Watermelon and white melon