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. 2020 Dec 1;13(2):1476-1486.
doi: 10.70252/KJFQ3498. eCollection 2020.

Hydration Efficiency of a Protein Beverage Consumed in a Bolus vs. Metered Pattern during Recovery

Chris McBride  1 , Tara Boy  2 , Matt Green  2 , Eric O'Neal  2 , Lee Renfroe  2
Affiliations

Hydration Efficiency of a Protein Beverage Consumed in a Bolus vs. Metered Pattern during Recovery

Chris McBride et al. Int J Exerc Sci. .

Abstract

This study compared hydration efficiency of a carbohydrate-protein (CHO-PRO) beverage consumed in a bolus (BOL) vs. a metered (MET) drinking pattern during recovery from exercise induced hypohydration. Participants (n = 10) lost 2 - 2.5% of body mass from sweating during a morning exercise session. Participants were then assigned to either consume a carbohydrate/electrolyte/protein beverage in a bolus (BOL) or metered incremental consumption (MET) (counterbalanced) pattern post exercise. Total rehydration beverage administered during recovery equaled 125% of fluid lost during exercise. BOL was administered within the first hour of recovery, MET was administered 25% during the first 30 min, then 12.5% every 30 min for the next 4 hours. Mean (±SD) intake was 2475 ± 324 mL (MET) and 2525 ± 293 mL (BOL) (p = 0.22). Mean urine production was significantly greater for BOL (1167 ml ± 293 ml) than MET (730 ml ± 324 ml) (p = 0.003). Hydration efficiency (fluid ingested vs. fluid retained as percent) was significantly greater for MET (69.1 ± 15.4) than BOL (53.7 ± 9.7) (p = 0.004). Results indicate that, across a ~ 6-hour recovery, a metered drinking pattern improves fluid retention and therefore, hydration efficiency when a carbohydrate-protein beverage is consumed. More research is needed in paradigms characterized by unlimited fluid availability.

Keywords: Fluid retention; post workout fluid recovery patterns.

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Figures

Figure 1
Figure 1
Mean Urine Output– an average of urine output for bolus and metered are represented at each of the four time points during recovery. * p ≤ 0.05 MET vs. BOL
Figure 2
Figure 2
Hydration efficiency for each individual and group data calculated at the end of recovery (6 h). * p ≤ 0.05 MET vs. BOL
Figure 3
Figure 3
Thirst Scale – an average was recorded at each time point. Thirst scale was assessed every 30 minutes during recovery. Greater value reflects greater thirst. * p ≤ 0.05 MET vs. BOL
Figure 4
Figure 4
Stomach Discomfort Scale - an average was recorded at each time point. Stomach discomfort was assessed every 30 minutes during recovery. Greater value reflects greater discomfort. * p ≤ 0.05 MET vs. BOL
See this image and copyright information in PMC

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