To help prevent injury, each time you participate in a vigorous activity you should be sure to include a

(1 point)
Responses

proper warm-up.
proper warm-up.

proper warm-up and cool-down.
proper warm-up and cool-down.

proper cool-down.
proper cool-down.

proper warm-up and stretching.
proper warm-up and stretching.
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The correct answer is:

proper warm-up and cool-down.