All of the following resistance training stressors would increase adrenal hormone release except:

Resistance training stressors that lead to the release of adrenal hormones such as cortisol are typically associated with high intensity, low rest intervals, and high training volume. These factors create a physiological demand that the body interprets as a stressor, prompting an increase in adrenal hormone release to help manage and adapt to that stress.

In particular, minimal time-under-tension, which refers to the amount of time a muscle is actively engaged during a lift, is not a significant contributor to increasing adrenal hormone levels when compared to the other factors mentioned. When the time-under-tension is minimal, the overall metabolic and mechanical stress that triggers adrenal hormone release is reduced. This is because lower muscular engagement typically results in less overall effort and metabolic demand, which does not elicit the same hormonal response associated with more intense or prolonged resistance training.

Therefore, the release of adrenal hormones is less prominent when the training focus includes minimal time-under-tension, characterizing it as the exception among the options listed.