Explanation:

- Option 1: Unless

"Unless" implies a condition where one thing will happen only if something else doesn't occur. It's about exceptions. However, it doesn't fit here as it creates a negative condition which is not needed in this context.

- Option 2: As long as

"As long as" means "provided that" or "on the condition that." It suggests continuity based on a specific condition. It fits perfectly here as your coach will show respect provided you are in top form.

- Option 3: Although

"Although" indicates a contrast between two ideas. It doesn't suit the context as the sentence isn't contrasting the relationship between form and respect.

- Option 4: As if

"As if" suggests something is not quite true, or is imagined. This option doesn't match the intended meaning of the sentence.