Table 2 Change in plasma volume, plasma sodium concentration, and thirst sensation

∆Plasma volume, %

 Japanese non-hydrated

-6.1

(0.8) ‡

-9.6

(1.2) ‡#

-4.1

(0.8) ‡

 Japanese hydrated

-5.6

(0.9) ‡

-8.0

(1.0) ‡

-4.5

(0.8) ‡

 Malaysian non-hydrated

-5.2

(0.6) ‡

-7.8

(1.7) ‡

-3.6

(1.4) ‡

 Malaysian hydrated

-5.3

(0.5) ‡

-5.6

(1.7) †‡

-1.0

(1.5)

∆Sodium, mmol · L ^-1

 Japanese non-hydrated

1.5

(0.4) ‡

1.9

(0.3) ‡

1.4

(0.4) ‡

 Japanese hydrated

1.8

(0.3) ‡

1.2

(0.4)

-0.1

(0.4) †

 Malaysian non-hydrated

1.6

(0.4) ‡

2.3

(0.3) ‡

1.6

(0.5) ‡

 Malaysian hydrated

1.3

(0.3) ‡

0.4

(0.2) †

-1.3

(0.6) †‡

Thirst sensation

 Japanese non-hydrated

0.2

(0.1)

0.8

(0.2)

2.2

(0.1)

1.7

(0.2)

 Japanese hydrated

0.2

(0.1)

0.6

(0.1)

0.7

(0.3) †

0.5

(0.2) †

 Malaysian non-hydrated

0.0

(0.0)

0.5

(0.1)

1.4

(0.2) *

1.3

(0.2)

 Malaysian hydrated

0.2

(0.1)

0.4

(0.2)

0.1

(0.1) †

0.1

(0.1) †