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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