Answer: It displays that exercise or work-out and venting increase arousal towards the anger to make it worse.
Explanation:
Venting is expression of emotion by releasing it and getting it out of the mind and body .It is depicts that it makes anger more worse than before state. Exercising to manage anger is also not the doing a prominent job of reducing it.
According to the question, it can be seen that venting and weight-lifting is not helping in managing the anger rather it is increasing it. Thus, Jackson's effort of exercising and his father believing in venting is making the situation bad as there is increase in arousal due to such act.