In a physically trained person:

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* a) Heart rate can reach higher levels than in an untrained person exercising at an equivalent workload.
* b) Stroke volume is greater than in an untrained person.
* c) Vagal tone is lower than in an untrained person.
* d) Vascular resistance is lower than in an untrained person.
* e) Left ventricular end-diastolic volume is less than in an untrained person.

Answer - b
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