HMS, BM EQ-Bank 947 MC

A tennis player is competing in a tournament on a hot day. Which of the following is an early sign of dehydration that might affect their movement efficiency?

Increased heart rate
Muscle cramps
Dizziness
Decreased performance

Show Answers Only

\(D\)

Show Worked Solution

D is correct: Decreased performance is the earliest measurable sign as even mild dehydration affects coordination and power output.

Other Options:

A is incorrect: Increased heart rate responds to multiple factors including exercise intensity, not specifically early dehydration.
B is incorrect: Muscle cramps occur with advanced dehydration and electrolyte imbalances, not early stages.
C is incorrect: Dizziness indicates moderate to severe dehydration, not early movement efficiency loss.