Abstract
Hispanic population is the fastest growing ethnic group in the U.S. and experiences a high prevalence of hypertension, a key risk factor of cardiovascular disease. Alterations in the regulation of blood pressure at the onset of exercise are evident in adults with hypertension and those with family history of hypertension. However, it is currently unknown whether such maladaptive pressor responses manifest during acute exercise in young Hispanic adults free from overt cardiovascular disease. PURPOSE: In this study, we examined the blood pressure response at the onset of static handgrip exercise in 19 Hispanic/Latino (H/La; 7 women) and 18 non-Hispanic White (NHW; 6 women) adults matched for age (H/La = 20 ± 2 (mean ± SD), NHW = 22 ± 4 years, p = 0.14) and BMI (H/La = 25 ± 2, NHW = 23 ± 3 kg/m2, p = 0.12). METHODS: Heart rate (HR; lead II ECG) and blood pressure (finometer) were measured during first 30 seconds of isometric handgrip (IHG) exercise at 30% and 40% of maximum voluntary contraction (MVC) and averaged for every 10 seconds. Stroke volume was calculated using modelflow technique and multiplied by HR to acquire cardiac output (CO). Total vascular conductance (TVC) was calculated as mean arterial pressure (MAP)/CO. RESULTS: Baseline MAP was similar between groups (H/La = 80 ± 6, NHW = 82 ± 8 mmHg, p = 0.31) however, the increase in MAP during IHG was significantly higher in Hispanic adults at both 20 seconds (30% MVC: H/La = 8 ± 4, NHW = 4 ± 4 mmHg, p = 0.01; 40% MVC: H/La = 10 ± 5, NHW = 5 ± 5 mmHg, p = 0.03) and 30 seconds (30% MVC: H/La = 10 ± 5, NHW = 5 ± 5 mmHg, p = 0.01; 40% MVC: H/La = 13 ± 7, NHW = 8 ± 5 mmHg, p = 0.03) of graded IHG exercise. This was accompanied with significantly higher decrease in TVC in Hispanic adults during first 20 seconds (30% MVC: H/La = -1 ± 5, NHW = 9 ± 9 ml/min/mmHg, p = 0.001; 40% MVC: H/La = 6 ± 8, NHW = 19 ± 19 ml/min/mmHg, p = 0.01) and 30 seconds (30% MVC: H/La = -1 ± 8, NHW = 11 ± 11 ml/min/mmHg, p = 0.002; 40% MVC: H/La = 6 ± 9, NHW = 18 ± 19 ml/min/mmHg, p = 0.02), indicating greater peripheral vasoconstriction in H/La adults during onset of IHG exercise at both intensities. The increase in HR (10-s: p=0.02; 20-s: p = 0.01) and CO (10-s: p=0.02; 20-s: p = 0.03) was significantly higher in NHW adults as compared to H/La adults during first 10 and 20 seconds of HG exercise at 40% MVC. CONCLUSION: These data suggest that the young healthy Hispanic adults demonstrate exaggerated pressor response coupled with exaggerated peripheral vasoconstriction at the onset of the exercise.
Recommended Citation
Dalve, Ashlesha; Nyarko, Ruby A.; Perez, Justo; and Kaur, Jasdeep
(2025)
"Rapid Onset Pressor Response in Young Healthy Hispanic Adults,"
International Journal of Exercise Science: Conference Proceedings: Vol. 2:
Iss.
17, Article 83.
Available at:
https://digitalcommons.wku.edu/ijesab/vol2/iss17/83
Included in
Health and Physical Education Commons, Medical Education Commons, Sports Sciences Commons
