Is individual day-to-day variation of arterial stiffness associated with variation of maximal aerobic performance?

Abstract Background Maximal aerobic capacity, e.g. maximal oxygen uptake (V̇O 2 max), is not constant, and it has a time-dependent variation based on the condition of individual. On other hand, arterial properties play an important role in determining performance, lower stiffness associated with higher cardiorespiratory fitness levels. This study examined whether individual variations performance are stiffness. Methods Twenty-four (mean age, 19.8 ± 0.2 y) 10 21.2 recreationally active young men women participated Experiment 1 (Ex1) (Ex2), respectively. Aerobic was assessed using graded power test or 1500-m time trial (Ex2). Simultaneously, brachial-ankle pulse wave velocity (baPWV) measured as index both Ex1 Ex2 before exercise trials. In experiments, subjects returned for measurement baPWV V̇O max at month after first measurements. Results No significant differences mean baPWV, run were seen between second visits. Mean significantly days when participants showed better ( P = 0.001 each) than worse time. addition, relationship changes from to visits =0.0001) =0.04). Conclusion These findings suggest that day-to-day