Department of Health, Leisure, and Exercise Science, Appalachian State University, Boone, North Carolina, USA.
J Strength Cond Res. 2010 Jun;24(6):1451-7. doi: 10.1519/JSC.0b013e3181d82d26.
The objective of this study was to evaluate the utility of ultrasound velocity (UV) to detect changes in the hydration status of wrestlers after undergoing acute dehydration and a 2-hour rehydration period. Forty-seven NCAA wrestlers (mean+/-SEM); age 19.1+/-0.2 years, height 1.73+/-0.1 m, body mass (BM) 79.4+/-2.4 kg were tested in euhydrated, dehydrated, and a 2-hours rehydrated conditions. Hydration status was quantified by measuring changes in plasma osmolarity (Posm), urine osmolarity (Uosm), urine specific gravity (Usg), and BM. Ultrasound velocity was measured at 1 MHz using 1.5-microsecond duration tone burst in the soleus muscle. Significant changes (p<0.001) in UV during periods of dehydration (BM change=-3.6+/-0.14%) (UV=+2.18 m.s) and rehydration (BM change=+2.8+/-0.12%) (UV=-2.89 m.s) were found. Significant main effects (p<0.001) were also found for Usg, Uosm, and Posm during dehydration. The change in Posm from the 1 to 2-hour rehydration time period significantly correlated to the change in UV during the same time period (r=0.27, p<0.001). This study demonstrates that changes in UV correspond to the changes of Posm, Usg, Uosm, and BM during acute dehydration and rehydration in collegiate wrestlers. The use of ultrasound measures may have potential application as an alternative field-based method to assess the hydration status of collegiate wrestlers although future research is warranted.
本研究旨在评估超声速度 (UV) 在检测摔跤运动员经历急性脱水和 2 小时补液期后身体水合状态变化方面的效用。47 名 NCAA 摔跤运动员（均值±SEM）；年龄 19.1±0.2 岁，身高 1.73±0.1 m，体重 79.4±2.4 kg，在水合状态正常、脱水和 2 小时补液 3 种条件下接受检测。通过测量血浆渗透压 (Posm)、尿渗透压 (Uosm)、尿比重 (Usg) 和体重 (BM) 的变化来量化水合状态。使用持续时间为 1.5 微秒的 1 MHz 短音脉冲在比目鱼肌处测量超声速度。在脱水期（BM 变化=-3.6±0.14%）（UV 增加=+2.18 m/s）和补液期（BM 变化=+2.8±0.12%）（UV 减少=-2.89 m/s）期间，UV 发生显著变化（p<0.001）。在脱水期间，Usg、Uosm 和 Posm 也存在显著的主要效应（p<0.001）。在 1 小时到 2 小时补液期间，Posm 的变化与同一时间内 UV 的变化显著相关（r=0.27，p<0.001）。本研究表明，在大学生摔跤运动员急性脱水和补液期间，UV 的变化与 Posm、Usg、Uosm 和 BM 的变化相对应。尽管需要进一步的研究，但超声测量可能具有作为替代现场方法评估大学生摔跤运动员水合状态的潜在应用。
