Validity of hydration non-invasive indices during the weightcutting and official weigh-in for Olympic combat sports
Fernández-Elías VE, Martínez-Abellán A, López-Gullón JM, Morán-Navarro R, Pallarés JG, De la Cruz-Sánchez E, Mora-Rodriguez R
PloS one · 38 citas
Cómo se estudió
- Diseño
- Estudio transversal (clasificado por nuestro filtro de IA)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
Según la declaración de financiación del texto completo.
Publicación
- Publicado
- 2014-04-16 · PLoS One · vol. 9 · número 4 · pág. e95336
- Editorial
- Public Library of Science
- Citado
- 65 citas · más que el 90% de estudios similares · 2.7× el promedio de su campo
- Referencias
- 51 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Thermoregulation and physiological responses · Body Composition Measurement Techniques · Exercise and Physiological Responses
- Palabras clave
- Urine osmolality, Urine specific gravity, Dehydration, Osmole, Urine, Bioelectrical impedance analysis, Urinalysis, Medicine, Animal science, Chemistry, Internal medicine, Biology, Body mass index, Biochemistry
- MeSH
- humans, dehydration, weight loss, urinalysis, thirst, osmolar concentration, sports, boxing, wrestling, adolescent, adult, female, male, athletes
7 autores
- Valentín E. Fernández-Elías🇪🇸University of Castilla-La Mancha
- Alberto Martínez-Abellán🇪🇸Universidad de Murcia
- José María López Gullón🇪🇸Universidad de Murcia
- Ricardo Morán‐Navarro🇪🇸Universidad de Murcia
- Jesús G. Pallarés🇪🇸University of Castilla-La Mancha; Universidad de Murcia
- Ernesto de la Cruz Sánchez🇪🇸Universidad de Murcia
- Ricardo Mora‐Rodríguez🇪🇸 · autor de correspondenciaUniversity of Castilla-La Mancha
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
In Olympic combat sports, weight cutting is a common practice aimed to take advantage of competing in weight divisions below the athlete's normal weight. Fluid and food restriction in combination with dehydration (sauna and/or exercise induced profuse sweating) are common weight cut methods. However, the resultant hypohydration could adversely affect health and performance outcomes.
Purpose
The aim of this study is to determine which of the routinely used non-invasive measures of dehydration best track urine osmolality, the gold standard non-invasive test.
Method
Immediately prior to the official weigh-in of three National Championships, the hydration status of 345 athletes of Olympic combat sports (i.e., taekwondo, boxing and wrestling) was determined using five separate techniques: i) urine osmolality (UOSM), ii) urine specific gravity (USG), iii) urine color (UCOL), iv) bioelectrical impedance analysis (BIA), and v) thirst perception scale (TPS). All techniques were correlated with UOSM divided into three groups: euhydrated (G1; UOSM 250-700 mOsm · kg H2O(-1)), dehydrated (G2; UOSM 701-1080 mOsm · kg H2O(-1)), and severely dehydrated (G3; UOSM 1081-1500 mOsm · kg H2O(-1)).
Results
We found a positive high correlation between the UOSM and USG (r = 0.89: p = 0.000), although this relationship lost strength as dehydration increased (G1 r = 0.92; G2 r = 0.73; and G3 r = 0.65; p = 0.000). UCOL showed a moderate although significant correlation when considering the whole sample (r = 0.743: p = 0.000) and G1 (r = 0.702: p = 0.000) but low correlation for the two dehydrated groups (r = 0.498-0.398). TPS and BIA showed very low correlation sizes for all groups assessed.
Conclusion
In a wide range of pre-competitive hydration status (UOSM 250-1500 mOsm · kg H2O(-1)), USG is highly associated with UOSM while being a more affordable and easy to use technique. UCOL is a suitable tool when USG is not available. However, BIA or TPS are not sensitive enough to detect hypohydration at official weight-in before an Olympic combat championship.
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