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Table 2 The return of Sosm to baseline levels during rehydration

From: Fluid type influences acute hydration and muscle performance recovery in human subjects

 

Recovery of Salivary Osmolality (Sosm)

  

Females (n = 8)

Males (n = 9)

Stimulated Sosm

 Deep

  K (min−1)

0.077 ± 0.015

0.123 ± 0.077

  τ (min)

13.3 ± 2.6

10.5 ± 4.3

  τ 1/2 (min)

9.2 ± 1.8

7.2 ± 3.0

 Sports

  K (min− 1)

0.028 ± 0.011

0.035 ± 0.021

  τ (min)

43.2 ± 22.7

38.5 ± 23.8

  τ 1/2 (min)

30.0 ± 15.8

26.6 ± 16.5

 Spring

  K (min− 1)

0.031 ± 0.006

0.032 ± 0.023

  τ (min)

33.6 ± 5.9

43.9 ± 19.6

  τ 1/2 (min)

23.3 ± 4.1

30.4 ± 13.6

Unstimulated Sosm

 Deep

  K (min− 1)

0.085 ± 0.017

0.106 ± 0.0.38

  τ (min)

12.3 ± 2.7

10.3 ± 2.7

  τ 1/2 (min)

8.5 ± 1.8

7.2 ± 1.8

 Sports

  K (min−1)

0.028 ± 0.013

0.030 ± 0.014

  τ (min)

42.0 ± 16.6

32.9 ± 9.6

  τ 1/2 (min)

29.1 ± 11.5

22.8 ± 6.6

 Spring

  K (min−1)

0.028 ± 0.011

0.032 ± 0.023

  τ (min)

42.1 ± 13.3

40.0 ± 16.1

  τ 1/2 (min)

29.1 ± 19.1

27.7 ± 11.2

  1. The relationship between Sosm and time during the rehydration phase was best fit by a mono-exponential (one-phase decay) model. One-phase decay equation: Sosm = (Sosm(peak)- Sosm(baseline))Kt + Sosm(baseline); K = rate constant, tau (τ) =1/K, and τ 1/2 = half-time Sosm recovery. Data presented as mean ± S.D