[111-119] Quality of the evidence reviewed was affected by the inherent difficulty of blinding participants to exercise interventions. Some studies also lacked blinding (or reporting of blinding) of assessors to interventions or had meaningful differences in baseline characteristic between intervention groups. The Work Group s confidence in the quality of the evidence for exercise overall is low, but varied across types of interventions, with the strongest evidence (moderate quality) found for combined aerobic/resistance exercise and for recreational group sports. Patient preferences regarding exercise may vary considerably; some may dislike exercise, while others may value it as a means to potentially limit pill burden. Preferences for different types of exercise may also vary. Patients who dislike traditional exercise may be more likely to engage in group sports due to social or competitive aspects. The benefits of exercise outweigh the harms, particularly given the wide range of other health parameters positively affected by physical activity. Recommendation 19. We recommend a target for aerobic exercise of at least 120 minutes per week for reduction in blood pressure. (Strong for | Not Reviewed, Amended) Discussion As this is a Not Reviewed, Amended recommendation, the Work Group did not systematically review new evidence related to this recommendation. Two meta-analyses of RCTs studying the effects of aerobic exercise on blood pressure were reviewed during the 2014 VA/DoD HTN CPG update and provide evidence that the quantity of aerobic exercise influences its efficacy in blood pressure reduction.[120,121] Whelton et al. (2002) showed statistically significant improvements in blood pressure for interventions involving at least 120 minutes/week of aerobic exercise; magnitude of effect was clinically meaningful for SBP and DBP.[121] Kelley et al. 