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Table 3 Changes of hydration variables measured in the WCS

From: Changes in hydration status of elite Olympic class sailors in different climates and the effects of different fluid replacement beverages

 

Crystal Light (C)

Gatorade (G)

Infinit (INW)

USG pre (AU)

1.020 ± 0.003

1.020 ± 0.002

1.018 ± 0.002

USG post (AU)c

1.015 ± 0.006

1.007 ± 0.002

1.014 ± 0.002

Change in body mass (kg)

0.3 ± 0.1

0.4 ± 0.2

0.3 ± 0.2

Change in hemoglobin (%)+

−4.1 ± 1.5

−7.5 ± 1.6

−4.5 ± 3.0b

Change in plasma volume (%)+

1.3 ± 0.28

1.7 ± 0.33

1.5 ± 0.82

Sweat rate (mL.h-1)

510.1 [20.9 -841.1]

597.3 [401.1 – 848.0]

727.2 [456.2-849.0]

Sodium intake (g)*

0

1.2 [1.1 – 1.2]

4.7 [4.4 – 4.7]

Sodium loss (g)

3.1 [0.94 – 5.9]

3.7 [2.0 – 5.8]

4.9 [2.0 – 7.4]

Sodium balance (g)

−3.1 [−4.4 – 0.94]

−2.5 [2.9 - -0.77]

−0.23 [−1.2 – 2.7]a

  1. * - All groups are significantly different from each other (p < 0.001). a – Significantly different from Crystal Light (p = 0.022). + Main effect for time indicating that there was an increase in plasma volume in all groups following training (p < 0.001). b – Significantly different from pre-training (p < 0.05). c – different from pre-training USG with a main effect for time (p = 0.003).
  2. Values are shown as the mean (range) for each condition.
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Journal of the International Society of Sports Nutrition

ISSN: 1550-2783

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