 Neuroplastic potential will be assessed using TMS. TMS-induced motor evoked potentials MEPs will be recorded from the abductor pollicis brevis as a way to measure changes in the excitability of the corticospinal tract in response to exercise and paired associative stimulation. Serum brain-derived neurotrophic factor BDNF and cortisol levels will be obtained through blood specimen samples in order to examine the potential exercise-induced changes in known stress- and neuroplasticity-related biomarkers. Mood and affect will be surveyed using the Activation-Deactivation Checklist AD ACL, feeling scale FS, and felt arousal scale FAS. These measures will permit the assessment of exercise-induced changes in mood and affect. 