The National Institute of Health summarized stretching activities in one sentence: “To avoid decrease in strength and performance that may occur in athletes due to static stretching before competition or activity, dynamic stretching is recommended for warm-up.” But what is the difference between "static" and "dynamic" stretching, and does it matter?

The National Institute of Health summarized stretching activities in one sentence: “To avoid decrease in strength and performance that may occur in athletes due to static stretching before competition or activity, dynamic stretching is recommended for warm-up.” But what is the difference between "static" and "dynamic" stretching, and does it matter?