How long before a 5k race should the warm-up take place? and if a 5k race has a demanding hill at?

the beginning of the race should I include that hill in my warm-up?thank you,Ed. Quinlan or:the beginning of the race should I include that hill in my

the beginning of the race should I include that hill in my warm-up?
thank you,
Ed. Quinlan

or:the beginning of the race should I include that hill in my warm-up?thank you,Ed. Quinlan

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