Final answer:
A proper warm-up does not lead to a refractory period of up to 2 hours in an athlete with asthma.
Step-by-step explanation:
The statement is false. A proper warm-up does not lead to a refractory period of up to 2 hours in an athlete with asthma.
A refractory period is the period of time after a muscle cell or neuron has fired an action potential and cannot be re-stimulated for a brief period. It is not related to asthma or warm-up exercises.
Instead, a warm-up can help prepare an athlete's body for physical activity by increasing blood flow, raising body temperature, and loosening up muscles. It can also help reduce the risk of injury.