If your leader is a fitness enthusiast, you'd better choose some healthy and nutritious food when you invite him to dinner. Here are some suggestions:

1. Salads and green vegetables: You can choose some diversified vegetable salads or order some green vegetables, such as spinach and cabbage.

2. Lean meat: You can choose some lean meat, such as chicken breast, turkey and fish. These foods are rich in protein, but relatively low in fat, which is very beneficial to fitness lovers.

3. Whole grain foods: Whole grain foods such as brown rice and whole wheat bread can provide energy and nutrition for fitness and help digestion.

4. Fruit: You can choose some fresh and nutritious fruits, such as bananas, apples and oranges.

5. Healthy snacks: You can order some healthy snacks, such as nuts and dried fruits, which can provide healthy fat and protein.

Generally speaking, choosing some foods rich in protein, carbohydrates, cellulose, vitamins and minerals can provide the required nutrition and energy for fitness enthusiasts.