Key result
In young male soccer players, a 10 mm Hg higher mean arterial pressure was associated with impaired autonomic cardiovascular modulation (lower SDNN, P<0.0001) but no difference in endothelial function.
Why the study?
Does a 10 mm Hg higher mean arterial pressure impair endothelial function and autonomic balance in young normotensive soccer players?
Cross-Sectional (n=29)
Does a 10 mm Hg higher mean arterial pressure impair endothelial function and autonomic balance in young normotensive soccer players?
p-value: p=<0.0001
Even within an optimal blood pressure range, a 10 mm Hg higher mean arterial pressure is associated with impaired autonomic cardiovascular modulation in young athletes.
No action on BP targets warranted in young athletes; leaves open whether small MAP differences predict later risk.
BACKGROUND: Blood pressure (BP) should be kept within a narrow range to allow adequate tissue perfusion. In particular, heart-rate variability (HRV) can be used to assess autonomic cardiovascular modulation, and flow-mediated dilation (FMD) can provide valuable information about the ability of the cardiovascular system to adapt to different pressures. Our objective in the study described here was to investigate the effect of a difference of 10mm Hg in mean arterial pressure (MAP) on endothelial function and autonomic balance in young and normotensive soccer players. METHODS: Twenty-nine young male soccer players (mean age 17.7 years) were divided into two groups according to their MAP (mm Hg): MAP-84 and MAP-94. The BP, FMD, HRV and maximum oxygen uptake (VO2max) of each group were measured. RESULTS: Systolic BP (SBP) and diastolic BP (DBP) were significantly higher (P < 0.0001 and P < 0.006, respectively) in the MAP-94 group. There were no differences in VO2max and endothelial function in the two groups (P < 0.7699). However, the standard deviation (SD) of normal RR intervals (SDNN) and the square root of the mean squared differences in successive RR intervals (RMSSD) were significantly lower in the MAP-94 than in the MAP-84 group (P < 0.0001 and P < 0.005, respectively). In the MAP-94 group, both the high-and low-frequency components were significantly (P < 0.001, P < 0.021, P < 0.017, respectively) lower in both absolute and normalized units, whereas the LF/HF ratio was significantly (P < 0.012) higher. CONCLUSIONS: Collectively, our findings indicate that in young soccer players, autonomic cardiovascular modulation is impaired when MAP is increased by 10mm Hg, even within an optimal range of BP and regardless of endothelial function and VO2max.
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Vargas et al. (2013) conducted a cross-sectional in Normotensive young soccer players (n=29). Higher mean arterial pressure (MAP-94) vs. Lower mean arterial pressure (MAP-84) was evaluated on Endothelial function and autonomic balance (HRV) (p=<0.0001). In young male soccer players, a 10 mm Hg higher mean arterial pressure was associated with impaired autonomic cardiovascular modulation (lower SDNN, P<0.0001) but no difference in endothelial function.
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