## 2 Materials and Methods
### Algorithm Design
\begin{table}
\begin{tabular}{l l l l l l l l} \hline
**Data Type** & **Feature** & **Females (n = 29)** & **Males (n = 32)** & **Data Type** & **Feature** & **Females (n = 29)** & **Males (n = 33)** \\ \hline Anthropometric & Height, cm & 161.1 \(\pm\) 4.68 & 172.4 \(\pm\) 7.07 & Demographic & Age, years & 37.2 \(\pm\) 11.85 & 35.6 \(\pm\) 10.75 \\ Weight, kg & 57.3 \(\pm\) 10.67 & 69.5 \(\pm\) 9.74 & Heart and blood vessels & EE, \% & 0.404 \(\pm\) 0.034 & 0.389 \(\pm\) 0.002 \\ BMI & 22.0 \(\pm\) 3.75 & 23.3 \(\pm\) 2.54 & & Size, mflig & 108.0 \(\pm\) 12.91 & 15.8 \(\pm\) 8.35 \\ WHR & 0.83 \(\pm\) 0.081 & 0.86 \(\pm\) 0.031 & & DBF, mmHg & 67.6 \(\pm\) 8.04 & 73.0 \(\pm\) 6.33 \\ Physical fitness & Grip strength, kg & 25.3 \(\pm\) 47 & 41.0 \(\pm\) 6.82 & & FTP, mmHg & 404.4 \(\pm\) 6.67 & 42.8 \(\pm\) 6.94 \\ Vital capacity, ml & 2469.6 \(\pm\) 95.89 & 381.1 \(\pm\) 857.63 & A, \% & 0.68 \(\pm\) 0.150 & 0.55 \(\pm\) 0.146 \\  & Resctct time, sec & 0.56 \(\pm\) 0.128 & 0.49 \(\pm\) 0.106 & Cap, mmHg & 95.3 \(\pm\) 15.34 & 96.1 \(\pm\) 0.74 \\  & Stl-and-rench, cm & 11.7 \(\pm\) 8.94 & 97.9 \(\pm\) 918 & Left abruptly, ms & 11.98 \(\pm\) 14.1 & 12.1 \(\pm\) 13.13 \\ Body composition & Badly fat, \% & 0.57 \(\pm\) 0.05 & 35.4 \(\pm\) 29.81 & Right abruptly, ms & 12.84 \(\pm\) 17.2 & 12.83 \(\pm\) 1.29 \\  & Moisture, \% & 0.57 \(\pm\) 0.045 & 0.51 \(\pm\) 0.034 & Left lower limb AH & 1.19 \(\pm\) 0.066 & 1.18 \(\pm\) 0.065 \\  & Protein, \% & 0.176 \(\pm\) 0.019 & 0.204 \(\pm\) 0.011 & Right lower limb AH & 1.17 \(\pm\) 0.058 & 1.19 \(\pm\) 0.070 \\  & Inorganist, \% & 0.017 \(\pm\) 0.001 & 0.204 \(\pm\) 0.001 & SEVR & 1.21 \(\pm\) 0.17 & 1.30 \(\pm\) 0.18 \\  & Inorganist, \% & 0.041 \(\pm\) 0.003 & 0.002 \(\pm\) 0.0026 & Bone density & STI & 96.1 \(\pm\) 5.42 & 105.8 \(\pm\) 17.47 \\  & Left lower limb muscle, kg & 6.45 \(\pm\) 0.01 & 9.67 \(\pm\) 1.87 & BUA & 45.98 \(\pm\) 4.42 & 45.69 \(\pm\) 6.03 \\  & Right lower limb muscle, kg & 6.53 \(\pm\) 0.74 & 9.85 \(\pm\) 1.69 & SGG & 182.2 \(\pm\) 27.14 & 195.9 \(\pm\) 3.10 \\  & Left upper limb muscle, kg & 1.65 \(\pm\) 0.32 & 2.41 \(\pm\) 0.61 & T-value & \(-\)0.5 \(\pm\) 0.83 & \(-\)0.04 \(\pm\) 0.91 \\ Right upper limb muscle, kg & 1.76 \(\pm\) 0.34 & 2.55 \(\pm\) 0.64 & & Z-value & \(-\)0.02 \(\pm\) 0.99 & 0.38 \(\pm\) 1.18 \\  & Trunk muscle, kg & 22.25 \(\pm\) 1.89 & 29.47 \(\pm\) 2.94 & STI/expected value of pers & 0.99 \(\pm\) 0.156 & 1.04 \(\pm\) 1.084 \\ \hline \end{tabular} BMI, body mass index; WHR, waist-to-high ratio; attention time, time measured by the human eye from seeing different signal lights to triggering the button by hand, which can express human ability; sitl-and-neck, used to measure human flexibility; balance change, limb, to stand one root of this eyes closed: EE, ejection factor; SBP, systolic blood pressure; DP, diastolic blood pressure; DP, pulsense; AI, augmentation index; Cap, central arterial pressure; PABVV, brachial-angle plane; wave velocity; ABI, alkayethical index; FEVSR, radial artery subencordcardi; visibility ratio; STI, bone strength index; BUA, the slope of the relationship between ultrasonic attenuation and frequency after passing through the medium in a certain frequency band; SOS, the propagation speed of ultrasound in the medium; T-value, the degree of deviation of the tester’s bone strength in terms of being higher or lower than the reference mean of young adults; Z-value, the degree of deviation of the tester’s bone strength in terms of being higher or lower than the expected average of their peers. Number of participants in each age group; aged 20-29 years, \(\pm\) 23 (11 females and 12 males); aged 30-39 years, \(\pm\) 15 (6 females and 9 males); aged 40-40 years, \(\pm\) 13 (6 females and 8 males); aged 50-59 years, \(\pm\) 9 (7 females and 2 males); aged 60-69 years, \(\pm\) 1 (1 male). Body composition data were measured by the bioelectrical impedance analysis method using a body composition analyzer. The bone density data were measured by the ultrasonic transmission method using an ultrasonic bone density meter. Grip strength was measured by a grip dynamometer. Participants used their dominant hand to hold the grip dynamometer as hard as they could while measuring.  
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