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Fig. 1
The overall architecture of the system.
Fig. 2
The band prototype of 150mm x 40mm in dimension and the distances between.
Fig. 3
The schematic of the current source and voltage recording on the band
Fig. 4
Flowchart of the signal processing
Fig. 5
Four locations were picked for the local impedance measurement: on the upper arm under the triceps, on the side of the belly, on the side of the back and on the thigh under the bicep femoris
Fig. 6
Results between the impedance measured by the band and the standard resistors
Fig. 7
Local impedance versus body fat at 4 locations: A) upper arm, B) belly, C) back, and D) thigh.
Fig. 8
Local impedance versus fasting glucose level at 4 locations: A) upper arm, B) belly, C) back, and D) thigh.
The information of volunteers in the experiment including age, BME, body fat (%) and fasting glucose
Age
BMI
Body fat (%)
Fasting glucose (mmol/l)
mean ±
31.9 ±
22.1 ±
20.7 ± 6.9
7.4 ±
std
6.6
3.5
1.8
min
18
17.3
6.2
4.9
max
44
27.6
33.1
10.9
Correlation coefficients and the corresponding confidence intervals (95%) between the local impedances measured at 4 locations: the upper arm, the belly, the back and the thigh, and the two parameters: the body fat and fasting glucose of all 21 volunteers. The best results are highlighted in boldness and red. Abbreviation: Cor. Coef: correlation coefficient. CI: confidence interval (95%)