I think the most ethical action would be to remove the hazard from the field. He might be tempted to act unethically to help his team win. What you would do in the circumstance is your opinion so I can't really help you there.
I think the answer is Alcohol
It's more accurate, especially since heart rate is almost universally measures in beats-per-minute, than, say, timing your pulse for a [factor of 60] seconds (30 seconds, 20 seconds, 15 seconds, 12 seconds, etc.).
Answer: C.
Explanation: The more intense the activity, the faster your heart will beat. Therefore, monitoring your heart rate during exercise can be an excellent way to monitor exercise intensity.
Answer:
Genetics
Bone structure
Muscles, tendons, and ligaments
Explanation: