Key result
Increasing intensities of isometric hand grip exercise elicited a more significant increase in systolic blood pressure (p<0.001) and LF/HF ratio in females compared to males.
Why the study?
Gender influences blood pressure and heart rate variability, motivating this investigation into how gender affects BP and HRV during increasing intensities of isometric hand grip exercise.
Does gender influence blood pressure and heart rate variability responses to increasing intensities of isometric hand grip exercise in healthy untrained adults?
Cross-Sectional (n=19)
No
Does gender influence blood pressure and heart rate variability responses to increasing intensities of isometric hand grip exercise in healthy untrained adults?
p-value: p=<0.001
In untrained adults, females exhibit a greater increase in systolic blood pressure and sympathetic tone (LF/HF ratio) during short-interval isometric hand grip exercise compared to males.
Females show greater SBP and sympathetic responses to isometric exercise; hypothesis-generating and should not yet change practice.
ender influences blood pressure (BP) and heart rate variability (HRV). The purpose of this study was to investigate the influence of gender on BP and HRV during increasing intensities of isometric hand grip (IHG) exercise. Nineteen (n=19) (10 males, 9 females) participants aged 25.7±0.9 and 27.0±0.6 years (Mean± SEM), with height and weight of 173.4±3.1 cm, 72.8±3.7kg and 160.9±1.6 cm, 59.3±3.4 kg volunteered after ethical approval. BP, HRV and maximum voluntary contraction (MVC) was measured at rest. Thereafter, participants underwent 30% MVC for 2 minutes during which BP and HRV was taken with 10 minutes rest. Contractions were amplified to 35, 40, 45% MVC. One-Way ANOVA compared Mean±SEM values at 95% significance. The systolic blood pressure (SBP) increased significantly in females (p<0.001) than males (p<0.01); diastolic blood pressure (DBP) increased significantly in both gender (p<0.001); average number of heart beats increased significantly in males (p<0.001) than females (p<0.01); significant increase in LF/HF ratio in females (p<0.01) but not in males. However, there was no significant difference in the standard deviation of N-N interval (SDNN), low frequency (LF), high frequency (HF), very low frequency (VLF), root mean square of standard deviation (RMSSD), total frequency power (TFP), proportion of numbers of pairs of successive intervals (Pnn50) in both genders. This study may suggest a higher sympathetic influence (following rise in SBP and LF/HF ratio) in females than males during IHG exercise. Thus, variations exist in BP and HRV during short interval, altered intensities IHG exercise in both genders.
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Niyi‐Odumosu et al. (2023) conducted a cross-sectional in Healthy untrained adults (n=19). Isometric hand grip (IHG) exercise vs. Baseline (resting values) and opposite gender was evaluated on Systolic blood pressure (SBP) response to exercise (p=<0.001). Increasing intensities of isometric hand grip exercise elicited a more significant increase in systolic blood pressure (p<0.001) and LF/HF ratio in females compared to males.
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