某些疾病或亚健康状态可能会引起血液红细胞膜性质的改变，而这种改变又会影响到血液的阻抗变化。

The character change of blood red cell membrane is aroused probably by some disease and state of the sub-health. However, this change can effect impedance of the blood.

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结论：体质与亚健康有着密切的联系，体质差的人大多处于心理或躯体的亚健康状态。

CONCLUSION:Physical fitness is closely related with sub-health, so the people of poor physical fitness are mostly at sub-healthy state psychologically or physically.

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