Question

during exercise testing conducted before and after a 16-week jogging program, blood epinephrine (adrenaline) concentration during standardized submaximal exercise would:

a. be increased when compared to pre-training values, indicating enhanced sympathetic drive

b. be decreased when compared to pre-training values, indicating increased vagal tone

c. show no consistent change because the epinephrine release is matched to work performed

d. would decrease initially, then spike to supramaximal values, indicating hypersensitive adrenal activity due to training

Answer 1

A 16 week jogging programme will help improve the endurance of an individual. Endurance training also affects the adrenal gland just like skeletal muscles.
Adrenal medulla secretes adrenaline and non adrenaline.
In an untrained person, the adrenaline hormone is released in response to the stress generated due to exercises.
The endurance training results in adrenal adaptations and increase in size of adrenal gland. In a trained person the adrenaline release is increased which help in achieving better myocardial contraction and mental alertness resulting in better performance.
Answer : a. be increased when compared to pre-training values, indicating enhanced sympathetic drive