Cardiovascular deconditioning and hypertension risk in simulated microgravity: implications for long-duration missions

The primary health issue in long-duration missions i.e. space missions exists because astronauts lose their cardiovascular health through extended time spent in microgravity. The clinical trial research studied cardiovascular transformations and hypertension development risks which occurred under simulated microgravity conditions in Uzbekistan while it assessed how effective exercise and nutritional programs worked. The 36 healthy participants included males from two ethnic groups who participated in the study. The researchers assigned the participants to three different groups which included a control group an exercise group and an exercise group that received electrolyte and antioxidant supplements. The researchers conducted measurements of hemodynamic parameters and vascular function and cardiac structure and orthostatic tolerance at zero days and thirty days and sixty days and ninety days. The results indicated that control group members experienced a decrease in systolic blood pressure which reached 11.5% while their cardiac output dropped by 30.3% and their systemic vascular resistance showed an increase of 31.9%. The body experienced a plasma volume reduction of 28.8% and the left ventricular mass showed 13.7% atrophy. Endothelial function decreased flow-dependent dilation by 43.8% and arterial stiffness through pulse wave velocity which increased from 23.5% to 23.5%. The exercise plus supplement group showed significantly lower changes in all parameters while postural hypotension occurred in 33.3% of participants from that group, compared to 83.3% from the control group. The control group showed 5.8 minutes of slope endurance time, while the full intervention group demonstrated 16.5 minutes. The research found that Uzbek and Russian volunteers exhibited no differences in their physiological responses. The research demonstrates that combining regular exercise with electrolyte and antioxidant supplements, which protects astronauts during long-duration spaceflights, effectively reduces cardiovascular disuse while preventing postural hypotension in simulated microgravity research.