## 1 Introduction  
Arterial stiffness, one of the factors indicating the function of blood vessels, is a main independent risk factor that can predict cardiovascular diseases [1]. Especially, this indicator is a leading cause of myocardial infarction in male adults [2]. Stiffening of the arterial wall causes an increase in the blood pressure by reducing the storage and buffering function of the arteries as well as by increasing the rate of pulse transmission regardless of the causes [3]. Usually, arterial stiffness worsens with aging [4]. Aging leads to thickening of the lining of blood vessels by increasing the amount of collagen in the smooth muscle layer and destroying the elastin structure [5]. These alterations result in increased arterial stiffness, leading to cardiometabolic diseases such as hypertension, diabetes, and dyslipidemia [6]. Body mass index (BMI), systolic blood pressure (SBP), low-density lipoprotein cholesterol (LDL-C), and vascular dysfunction are independent risk factors for cardiovascular disease [7; 8; 9]. According to a previous study, regarding the relationships among these factors, young adults with a greater number of risk factors for cardiovascular diseases showed significantly lower dilatory capacity of the brachial artery [7]. This finding suggests that vascular function is related to the risk factors for cardiovascular disease even in the younger generation, and managing the blood vessel function from a relatively younger age may be effective in preventing future cardiovascular diseases. Pulse wave velocity (PWV) and augmentation index (Alx) are widely used as valid methods for non-invasive measurement of arterial stiffness to evaluate the function of blood vessels in human [10; 11; 12; 13]. Alx is estimated as the ratio of waveform reflection amplitude to central pulse pressure and has a high correlation with carotid-femoral pulse wave velocity (cf-PWV), a golden standard that can directly measure central arterial stiffness [14]. The measurement of PWV is accepted as the most reliable technology through a recent consensus statement and is the most widely used technique to assess arterial stiffness [15; 16]. Recent studies have reported that physical fitness-related factors such as cardiorespiratory endurance and muscular strength are correlated with arterial stiffness [17; 18]. Improving cardiorespiratory endurance with regular aerobic exercise lowers arterial stiffness and reduces the risk factors for cardiovascular diseases, consequently reducing mortality due to cardiovascular disease [19]. In addition, increasing skeletal muscle mass and muscular strength with resistance exercise has been known to prevent sarcopenia caused by aging process, and the American Heart Association recommends resistance exercise for prevention and treatment of cardiovascular diseases [17; 20]. A study by [PERSON] et al. on 79 young male adults reported that upper body muscular strength was negatively correlated with aortic stiffness independent of cardiorespiratory capacity [21]. In addition, [PERSON] et al. study showed that the greater cross-sectional area of the thigh muscles in middle-aged male adults was associated with lower baPWV, suggesting that higher muscle strength and skeletal muscles may be correlated with arterial compliance [22]. It has been reported that an elevation in anaerobic power with anaerobic exercise has a positive effect on cardiovascular health as well as on the aerobic ability [23]. Moreover, improvement in anaerobic capacity with high-intensity interval training has a positive effect on releasing vasodilatory substances such as nitric oxide, suggesting improvement in anaerobic power has a positive effect on vascular function [24; 25]. Taken together, anaerobic capacity such as skeletal muscle mass, muscle strength, and anaerobic power may be related to arterial stiffness. However, studies confirming this correlation among young adults are insufficient; especially, it is unclear whether there is a direct relationship between anaerobic power and arterial stiffness.