PMID- 26694503
OWN - NLM
STAT- MEDLINE
DCOM- 20161221
LR  - 20220316
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Print)
IS  - 1064-8011 (Linking)
VI  - 30
IP  - 8
DP  - 2016 Aug
TI  - Validity of Urine Specific Gravity When Compared With Plasma Osmolality as a 
      Measure of Hydration Status in Male and Female NCAA Collegiate Athletes.
PG  - 2219-25
LID - 10.1519/JSC.0000000000001313 [doi]
AB  - Sommerfield, LM, McAnulty, SR, McBride, JM, Zwetsloot, JJ, Austin, MD, Mehlhorn, 
      JD, Calhoun, MC, Young, JO, Haines, TL, and Utter, AC. Validity of urine specific 
      gravity when compared with plasma osmolality as a measure of hydration status in 
      male and female NCAA collegiate athletes. J Strength Cond Res 30(8): 2219-2225, 
      2016-The purpose of this study was to evaluate the response of urine specific 
      gravity (Usg) and urine osmolality (Uosm) when compared with plasma osmolality 
      (Posm) from euhydration to 3% dehydration and then a 2-hour rehydration period in 
      male and female collegiate athletes. Fifty-six National Collegiate Athletic 
      Association (NCAA) wrestlers (mean +/- SEM); height 1.75 +/- 0.01 m, age 19.3 +/- 0.2 
      years, and body mass (BM) 78.1 +/- 1.8 kg and 26 NCAA women's soccer athletes; 
      height 1.64 +/- 0.01 m, age 19.8 +/- 0.3 years, and BM 62.2 +/- 1.2 kg were evaluated. 
      Hydration status was obtained by measuring changes in Posm, Uosm, Usg, and BM. 
      Male and female subjects dehydrated to achieve an average BM loss of 2.9 +/- 0.09% 
      and 1.9 +/- 0.03%, respectively. Using the medical diagnostic decision model, the 
      sensitivity of Usg was high in both the hydrated and dehydrated state for males 
      (92%) and females (80%). However, the specificity of Usg was low in both the 
      hydrated and dehydrated states for males (10 and 6%, respectively) and females 
      (29 and 40%, respectively). No significant correlations were found between Usg 
      and Posm during either the hydrated or dehydrated state for males or females. 
      Based on these results, the use of Usg as a field measure of hydration status in 
      male and female collegiate athletes should be used with caution. Considering that 
      athletes deal with hydration status on a regular basis, the reported low 
      specificity of Usg suggests that athletes could be incorrectly classified leading 
      to the unnecessary loss of competition.
FAU - Sommerfield, Lesley M
AU  - Sommerfield LM
AD  - Department of Health and Exercise Science, Appalachian State University, Boone, 
      North Carolina.
FAU - McAnulty, Steven R
AU  - McAnulty SR
FAU - McBride, Jeffrey M
AU  - McBride JM
FAU - Zwetsloot, Jennifer J
AU  - Zwetsloot JJ
FAU - Austin, Melanie D
AU  - Austin MD
FAU - Mehlhorn, Jonathan D
AU  - Mehlhorn JD
FAU - Calhoun, Mason C
AU  - Calhoun MC
FAU - Young, Juliane O
AU  - Young JO
FAU - Haines, Traci L
AU  - Haines TL
FAU - Utter, Alan C
AU  - Utter AC
LA  - eng
GR  - R44 AG042990/AG/NIA NIH HHS/United States
PT  - Comparative Study
PT  - Journal Article
PT  - Validation Study
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Adolescent
MH  - Dehydration/blood/*diagnosis/therapy/urine
MH  - Female
MH  - Fluid Therapy
MH  - Humans
MH  - Male
MH  - Osmolar Concentration
MH  - Plasma/*chemistry
MH  - Sensitivity and Specificity
MH  - Soccer/*physiology
MH  - Specific Gravity
MH  - Universities
MH  - Urine/*chemistry
MH  - Wrestling/*physiology
MH  - Young Adult
PMC - PMC4912946
MID - NIHMS743765
EDAT- 2015/12/24 06:00
MHDA- 2016/12/22 06:00
PMCR- 2017/08/01
CRDT- 2015/12/24 06:00
PHST- 2015/12/24 06:00 [entrez]
PHST- 2015/12/24 06:00 [pubmed]
PHST- 2016/12/22 06:00 [medline]
PHST- 2017/08/01 00:00 [pmc-release]
AID - 10.1519/JSC.0000000000001313 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2016 Aug;30(8):2219-25. doi: 10.1519/JSC.0000000000001313.