Water consumption patterns impact hydration markers in males working in accordance with the National Institute for Occupational Safety and Health recommendations
Pryor RR, Larson JR, Vandermark LW, Johnson BD, Schlader ZJ
Journal of occupational and environmental hygiene · 2 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- National Institute for Occupational Safety and Health
- Gobierno
- NIOSH CDC HHS
- Subvenciones
- National Institute for Occupational Safety and Health (R01 OH011528)
Según 2 financiadores declarados.
Publicación
- Publicado
- 2023-06-02 · J Occup Environ Hyg · vol. 20 · número 9 · págs. 414–425
- Editorial
- Taylor & Francis
- Citado
- 4 citas · más que el 65% de estudios similares · 0.6× el promedio de su campo
- Referencias
- 40 trabajos
- Acceso
- De pago
- Áreas de investigación
- Thermoregulation and physiological responses · Cardiovascular and exercise physiology · Sleep and Work-Related Fatigue
- Palabras clave
- water intake, hydration, hydration biomarkers, heat exposure, plasma volume, plasma osmolality, urine osmolality, free water clearance, thirst, gastrointestinal symptoms, occupational heat exposure, urine output, body mass
- MeSH
- humans, dehydration, water, exercise, water-electrolyte balance, drinking, osmolar concentration, united states, male, national institute for occupational safety and health, u.s.
5 autores
- Riana R. Pryor🇺🇸 · autor de correspondenciaUniversity at Buffalo, State University of New York
- Jonathan R. Larson🇺🇸University at Buffalo, State University of New York
- Lesley W. Vandermark🇺🇸University at Buffalo, State University of New York
- Blair D. Johnson🇺🇸Indiana University Bloomington; Indiana University
- Zachary J. Schlader🇺🇸Indiana University Bloomington; Indiana University
Resumen
El texto original del estudio, en el idioma en que se publicó.
The impact of water consumption bolus volume and frequency on hydration biomarkers during work in the heat is unknown. In a randomized, crossover fashion, eight males consumed either 500 mL of water every 40 min or 237 mL of water every 20 min during 2 hr of continuous walking at 6.4 kph, 1.0% grade in a 34 °C/30% relative humidity environment, followed by 2 hr of rest. Hydration biomarkers and variables were assessed pre-work, post-work, and after the 2 hr recovery. There were no differences in body mass between trials at any time point (all p > 0.05). Percent change in plasma volume during work was not different when 237 mL of water was repeatedly consumed (-1.6 ± 8.2%) compared to 500 mL of water (-1.3 ± 3.0%, p = 0.92). Plasma osmolality was maintained over time (p = 0.55) with no difference between treatments (p = 0.21). When consuming 500 mL of water repeatedly, urine osmolality was lower at recovery (205 ± 108 mOsmo/L) compared to pre-work (589 ± 95 mOsmo/L, p p = 0.14). Free water clearance at recovery was greater with repeated consumption of 500 mL of water (1.2 ± 1.0 mL/min) compared to 237 mL of water (0.4 ± 0.8 mL/min, p = 0.02). Urine volume was not different between treatments post-work (p = 0.62), but greater after 2 hr of recovery when repeatedly consuming 500 mL of water compared to 237 mL (p = 0.01), leading to greater hydration efficiency upon recovery with repeated consumption of 237 mL of water (68 ± 12%) compared to 500 mL (63 ± 14%, p = 0.01). Thirst and total gastrointestinal symptom scores were not different between treatments at any time point (all p > 0.05). Body temperatures and heart rate were not different between treatments at any time point (all p > 0.05). Drinking larger, less frequent water boluses or drinking smaller, more frequent water boluses are both reasonable strategies to promote adequate hydration and limit changes in body mass in males completing heavy-intensity work in the heat.
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