4.1. Limitations
ESSENTIAL HYPERTENSION
This study has several limitations. First, the sample size was small, with only 36 participants included, which may limit the generalizability of the findings. Second, the intervention duration was relatively short, consisting of only 12 weeks of Liuzijue exercise, which may need to be increased to capture the long-term effects or changes in the subjects’ blood pressure patterns. Additionally, the study only focused on the effects of Liuzijue exercise in the morning and afternoon on the circadian rhythm of blood pressure in patients with essential hypertension without exploring other potential impacts or variables.It is noteworthy that in this study, 8 men were assigned to the MEG, whereas only 5 were assigned to the WTG. This variation can be attributed to the constraints imposed by experimental conditions and methodologies. Ben-Dov conducted ambulatory blood pressure monitoring in 3957 patients between 1991 and 2005, and his findings revealed that ambulatory blood pressure typically exhibited lower values in women compared to men.In future research, it would be beneficial to investigate the effects of exercise at different times of the day on vascular endothelial function, hemodynamics, or other relevant factors to provide a more comprehensive understanding.