* 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