-transparent.png){kind=logo}
This investigation evaluated the validity and sensitivity of urine color (Ucol), specific gravity (Usg), and osmolality (Uosm) as indices of hydration status, by comparing them to changes in body water. Nine highly trained males underwent a 42-hr protocol involving dehydration to 3.7% of body mass (Day 1, -2.64 kg), cycling to exhaustion (Day 2, -5.2% of body mass, -3.68 kg), and oral rehydration for 21 hr. The ranges of mean (across time) blood and urine values were Ucol, 1-7; Usg, 1.004-1.029; Uosm, 117-1,081 mOsm x kg-1; and plasma osmolality (Posm), 280-298 mOsm x kg-1. Urine color tracked changes in body water as effectively as (or better than) Uosm, Usg, urine volume, Posm, plasma sodium, and plasma total protein. We concluded that (a) Ucol, Uosm, and Usg are valid indices of hydration status, and (b) marked dehydration, exercise, and rehydration had little effect on the validity and sensitivity of these indices.
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
November 1988,
The American journal of physiology,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
April 1999,
Canadian journal of applied physiology = Revue canadienne de physiologie appliquee,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
June 1976,
The Journal of sports medicine and physical fitness,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
June 1998,
International journal of sports medicine,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
April 1944,
The Journal of physiology,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
January 1956,
Comptes rendus des seances de la Societe de biologie et de ses filiales,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
March 1994,
Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
July 2007,
The Southeast Asian journal of tropical medicine and public health,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
January 1964,
La Revue du praticien,
L E Armstrong, and
J A Soto, and
F T Hacker, and
D J Casa, and
S A Kavouras, and
C M Maresh
January 1986,
European journal of applied physiology and occupational physiology,
