Final answer:
Pre-exercise warm-up routines help increase muscle flexibility and blood flow, minimizing the risk of injury for athletes at any level. They are important regardless of workout duration or athlete status.
Step-by-step explanation:
The correct answer to which statement is true regarding pre-exercise warm-up routines is: c) They help increase muscle flexibility and blood flow.
Warm-ups are an essential part of any exercise routine, regardless of the length of the workout session or the athlete's level.
Warming up properly minimizes the risk of muscle injuries and tendinitis by gradually increasing heart rate and blood flow to the muscles, thus making them more pliable and less likely to sustain injuries.
This is important for both amateur and professional athletes. Flexibility exercises, such as stretching, are often included in warm-up routines to enhance the range of motion and avoid injuries associated with exercise.