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Evaluation of Ultrasound Velocity to Assess the Hydration Status of Wrestlers

Utter, Alan C1; McAnulty, Steven R1; Sarvazyan, Armen2; Query, Michael C1; Landram, Michael J1

Journal of Strength & Conditioning Research: June 2010 - Volume 24 - Issue 6 - pp 1451-1457
doi: 10.1519/JSC.0b013e3181d82d26
Original Research

Utter, AC, McAnulty, SR, Sarvazyan, A, Query, MC, and Landram, MJ. Evaluation of ultrasound velocity to assess the hydration status of wrestlers. J Strength Cond Res 24(6): 1451-1457, 2010-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·s1) and rehydration (BM change = +2.8 ± 0.12%) (UV = −2.89 m·s1) 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.

1Department of Health, Leisure, and Exercise Science, Appalachian State University, Boone, North Carolina; and 2Artann Laboratories, West Trenton, New Jersey

Address correspondence to Dr. Alan C. Utter, utterac@appstate.edu.

© 2010 National Strength and Conditioning Association