TY - JOUR
T1 - Changes in the skin characteristics associated with dehydration and rehydration
AU - Eda, Nobuhiko
AU - Nakamura, Nobuhiro
AU - Inai, Yuto
AU - Sun, Ziyue
AU - Sone, Ryota
AU - Watanabe, Koichi
AU - Akama, Takao
N1 - Funding Information:
This research was supported by the High Performance Sport Centre Total Conditioning Research Project from JAPAN SPORT COUNCIL.
Publisher Copyright:
© 2022 European College of Sport Science.
PY - 2023
Y1 - 2023
N2 - The present study aimed to test the hypothesis that changes in the dermal tissue dielectric constant (TDC) and biomechanical properties of the skin would be correlated with the indicators related to dehydration. Ten healthy adult men were enrolled in three trials: no fluid intake (DEH), ad libitum fluid intake (AL-HYD), and programmed fluid intake (P-HYD) after exercise in a randomised crossover design. The participants performed a pedalling exercise at 60% heart rate reserve until 2% body mass loss. At 120 min after exercise, an incremental exercise test was carried out. Aerobic capacity, body composition, TDC, biomechanical properties of the skin (pliability, viscoelasticity, and total recovery), and indicators related to dehydration in the serum and urine were measured before and 120 min after exercise. Higher values of the pliability and viscoelasticity, and lower value of the total recovery on the hand were demonstrated in the P-HYD trial compared to the DEH trial (all P < 0.05). Changes in the TDC were significantly correlated with changes in body mass, total body water, serum osmolarity, and hematocrit (all P < 0.05). Changes in the biomechanical properties of the hand were significantly correlated with changes in body mass, hematocrit, and urine specific gravity (all P < 0.05). The present study showed that the changes in skin characteristics correlated with the body water and dehydration-associated indicators in the serum and urine, thus suggesting that skin characteristics may be useful in the assessment of dehydration. Highlights This study was the first to investigate the effect of dehydration and rehydration on the TDC and biomechanical properties of the skin upon instrumental measure, and not manual testing. This study confirmed the decline in aerobic capacity by dehydration and immediate recovery with sufficient rehydration. Changes in the TDC and the biomechanical properties of the skin correlated with the body water and dehydration-associated indicators in the serum and urine. Skin characteristics may be useful in the assessment of dehydration.
AB - The present study aimed to test the hypothesis that changes in the dermal tissue dielectric constant (TDC) and biomechanical properties of the skin would be correlated with the indicators related to dehydration. Ten healthy adult men were enrolled in three trials: no fluid intake (DEH), ad libitum fluid intake (AL-HYD), and programmed fluid intake (P-HYD) after exercise in a randomised crossover design. The participants performed a pedalling exercise at 60% heart rate reserve until 2% body mass loss. At 120 min after exercise, an incremental exercise test was carried out. Aerobic capacity, body composition, TDC, biomechanical properties of the skin (pliability, viscoelasticity, and total recovery), and indicators related to dehydration in the serum and urine were measured before and 120 min after exercise. Higher values of the pliability and viscoelasticity, and lower value of the total recovery on the hand were demonstrated in the P-HYD trial compared to the DEH trial (all P < 0.05). Changes in the TDC were significantly correlated with changes in body mass, total body water, serum osmolarity, and hematocrit (all P < 0.05). Changes in the biomechanical properties of the hand were significantly correlated with changes in body mass, hematocrit, and urine specific gravity (all P < 0.05). The present study showed that the changes in skin characteristics correlated with the body water and dehydration-associated indicators in the serum and urine, thus suggesting that skin characteristics may be useful in the assessment of dehydration. Highlights This study was the first to investigate the effect of dehydration and rehydration on the TDC and biomechanical properties of the skin upon instrumental measure, and not manual testing. This study confirmed the decline in aerobic capacity by dehydration and immediate recovery with sufficient rehydration. Changes in the TDC and the biomechanical properties of the skin correlated with the body water and dehydration-associated indicators in the serum and urine. Skin characteristics may be useful in the assessment of dehydration.
KW - Assessment
KW - body composition
KW - health
KW - performance
KW - physiology
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U2 - 10.1080/17461391.2022.2044914
DO - 10.1080/17461391.2022.2044914
M3 - Article
C2 - 35179449
AN - SCOPUS:85126005387
SN - 1746-1391
VL - 23
SP - 552
EP - 560
JO - European Journal of Sport Science
JF - European Journal of Sport Science
IS - 4
ER -