Student or educator? Sign up with your school email and get 6 months of Pro free.
CoChat
Sign Up
Cited by 11

The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.

Reliability of Urinary Dehydration Markers in Elite Youth Boxers

Zubac, Damir, Cular, Drazen, Marusic, Uros·2018·International Journal of Sports Physiology and Performance
DOI 10.1123/ijspp.2016-0621
Open this paper in CoChat — free account

Abstract

Purpose: To determine the reliability and diagnostic accuracy of noninvasive urinary dehydration markers in field-based settings on a day-to-day basis in elite adolescent amateur boxers. Methods: Sixty-nine urine samples were collected daily from 23 athletes (17.3 ± 1.9 y) during their weight-stable phase and analyzed by field and laboratory measures of hydration status. Urine osmolality (U OSM), urine specific gravity (U SG), total protein content (T PC), and body-mass stability were evaluated to determine fluid balance and hydration status. Overall macronutrient and water intake were determined using dietary records. According to their anthropometric characteristics, athletes were assigned into 2 groups: lightweight (L WB) and heavyweight (H WB) boxers. Results: Data presented on U OSM demonstrated a uniform increment by 11.2% ± 12.8% (L WB) and 19.9% ± 22.7% (H WB) (P < .001) over the course of the study, even during the weight-stable phase (body mass, ICC = .99) and ad libitum fluid intake (42 ± 4 mL · kg−1 · d−1). The intraclass correlation coefficients (ICCs) ranged from .52 to .55 for U SG and .38 to .52 for U OSM, further indicating inconsistency of the urinary dehydration markers. Poor correlations were found between U SG and T PC metabolites (r = .27, P = .211). Conclusions: Urinary dehydration markers (both U SG and U OSM) exhibit high variability and seem to be unreliable diagnostic tools to track actual body-weight loss in real-life settings. The ad libitum fluid intake was apparently inadequate to match acute fluid loss during and after intense preparation. The applicability of a single-time-point hydration-status assessment concept may preclude accurate assessment of actual body-weight deficits in youth boxers.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1123/ijspp.2016-0621

Cites

3 of 3 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 3 references

Research works printed but not linked: 69

  1. Maughan, 2007, Errors in the estimation of hydration status from changes in body mass, J Sports Sci, 25, 797, 10.1080/02640410600875143 · DOI · Paper page
  2. Carter, 1982, Physical structure of Olympic athletes, part I: the Montreal Olympic Games anthropological project, 16, 107
  3. Dihazi, 2007, Urinary proteomics: a tool to discover biomarkers of kidney diseases, Expert Rev Proteomics, 4, 39, 10.1586/14789450.4.1.39 · DOI
  4. Martin, 2006, Effects of dietary protein intake on indexes of hydration, J Am Diet Assoc, 106, 587, 10.1016/j.jada.2006.01.011 · DOI
  5. Oppliger, 2003, Weight loss practices of college wrestlers, Int J Sport Nutr Exerc Metab, 13, 29, 10.1123/ijsnem.13.1.29 · DOI
  6. Zubac, 2016, Hydration status assessment techniques and their applicability in combat sports: a literature review, Strength Cond J, 38, 80, 10.1519/SSC.0000000000000236 · DOI
  7. Gleim, 2000, Exercise and Sport Science
  8. Hamouti, 2013, Comparison between blood and urinary fluid balance indices during dehydrating exercise and the subsequent hypohydration when fluid is not restored, Eur J Appl Physiol, 113, 611, 10.1007/s00421-012-2467-9 · DOI
  9. Pakkala, 2010, Harmonised information exchange between decentralised food composition database systems, Eur J Clin Nutr, 64, S58, 10.1038/ejcn.2010.212 · DOI
  10. Oppliger, 2003, Weight loss practices of college wrestlers, Int J Sport Nutr Exerc Metab, 13, 29, 10.1123/ijsnem.13.1.29 · DOI
  11. Franchini, 2012, Weight loss in combat sports: physiological, psychological and performance effects, J Int Soc Sports Nutr, 9, 52, 10.1186/1550-2783-9-52 · DOI · Paper page
  12. Shirreffs, 1998, Urine osmolality and conductivity as indices of hydration status in athletes in the heat, Med Sci Sports Exerc, 30, 1598, 10.1097/00005768-199811000-00007 · DOI
  13. Pettersson, 2014, Dietary intake at competition in elite Olympic combat sports, Int J Sport Nutr Exerc Metab, 24, 98, 10.1123/ijsnem.2013-0041 · DOI
  14. Poortmans, 1994, Kidney function during exercise in healthy and diseased humans, Sports Med, 18, 419, 10.2165/00007256-199418060-00006 · DOI
  15. Reljic, 2016, Rapid body mass loss affects erythropoiesis and hemolysis but does not impair aerobic performance in combat athletes, Scand J Med Sci Sports, 26, 507, 10.1111/sms.12485 · DOI
  16. Zubac, 2016, Hydration status assessment techniques and their applicability in combat sports: a literature review, Strength Cond J, 38, 80, 10.1519/SSC.0000000000000236 · DOI
  17. Cheuvront, 2015, Spot urine concentrations should not used for hydration assessment: a methodology review, Int J Sport Nutr Exerc Metab, 25, 293, 10.1123/ijsnem.2014-0138 · DOI · Paper page
  18. Iwata, 1979, New micro-turbidimetric method for determination of protein in cerebrospinal fluid and urine, Clin Chem, 25, 1317, 10.1093/clinchem/25.7.1317 · DOI
  19. Oppliger, 2005, Accuracy of urine specific gravity and osmolality as indicators of hydration status, Int J Sport Nutr Exerc Metab, 15, 236, 10.1123/ijsnem.15.3.236 · DOI · Paper page
  20. Dihazi, 2007, Urinary proteomics: a tool to discover biomarkers of kidney diseases, Expert Rev Proteomics, 4, 39, 10.1586/14789450.4.1.39 · DOI
  21. Akerman, 2016, Heat stress and dehydration in adapting for performance: good, bad, both, or neither?, Temperature, 3, 412, 10.1080/23328940.2016.1216255 · DOI
  22. Pakkala, 2010, Harmonised information exchange between decentralised food composition database systems, Eur J Clin Nutr, 64, S58, 10.1038/ejcn.2010.212 · DOI
  23. Baxmann, 2006, Influence of muscle mass and physical activity on serum and urinary creatinine and serum cystatin C, Clin J Am Soc Nephrol, 3, 348, 10.2215/CJN.02870707 · DOI · Paper page
  24. Poortmans, 1994, Kidney function during exercise in healthy and diseased humans, Sports Med, 18, 419, 10.2165/00007256-199418060-00006 · DOI
  25. Maughan, 2007, Errors in the estimation of hydration status from changes in body mass, J Sports Sci, 25, 797, 10.1080/02640410600875143 · DOI · Paper page
  26. Singh, 2013, Markers of hydration status in a 3-day trail running event, Clin J Sport Med, 23, 354, 10.1097/JSM.0b013e318286c2c3 · DOI
  27. Loenneke, 2011, Validity of the current NCAA minimum weight protocol: a brief review, Ann Nutr Metab, 258, 245, 10.1159/000330574 · DOI
  28. Pettersson, 2014, Hydration status in elite wrestlers, judokas, boxers, and taekwondo athletes on competition day, Int J Sport Nutr Exerc Metab, 24, 267, 10.1123/ijsnem.2013-0100 · DOI · Paper page
  29. Reljic, 2015, Effects of pre-competitional rapid weight loss on nutrition, vitamin status and oxidative stress in elite boxers, J Sports Sci, 33, 437, 10.1080/02640414.2014.949825 · DOI
  30. Cheuvront, 2010, Biological variation and diagnostic accuracy of dehydration assessment markers, Am J Clin Nutr, 92, 565, 10.3945/ajcn.2010.29490 · DOI · Paper page
  31. Baxmann, 2006, Influence of muscle mass and physical activity on serum and urinary creatinine and serum cystatin C, Clin J Am Soc Nephrol, 3, 348, 10.2215/CJN.02870707 · DOI · Paper page
  32. Adolph, 1947, Physiology of Man in the Desert
  33. Artioli, 2016, It is time to ban rapid weight loss from combat sports, Sports Med, 6, 1579, 10.1007/s40279-016-0541-x · DOI
  34. Hamouti, 2010, Effects of athletes’ muscle mass on urinary markers of hydration status, Eur J Appl Physiol, 109, 213, 10.1007/s00421-009-1333-x · DOI
  35. Cheuvront, 2014, Dehydration: physiology, assessment, and performance effects, Compr Physiol, 4, 257, 10.1002/cphy.c130017 · DOI · Paper page
  36. Oppliger, 2005, Accuracy of urine specific gravity and osmolality as indicators of hydration status, Int J Sport Nutr Exerc Metab, 15, 236, 10.1123/ijsnem.15.3.236 · DOI · Paper page
  37. Brown, 2012, Hydration status in adolescent judo athletes before and after training in the heat, Int J Sports Physiol Perform, 7, 39, 10.1123/ijspp.7.1.39 · DOI · Paper page
  38. Hamouti, 2013, Comparison between blood and urinary fluid balance indices during dehydrating exercise and the subsequent hypohydration when fluid is not restored, Eur J Appl Physiol, 113, 611, 10.1007/s00421-012-2467-9 · DOI
  39. Roemmich, 1997, Weight loss and wrestling training: effects on growth-related hormones, J Appl Physiol, 82, 1760, 10.1152/jappl.1997.82.6.1760 · DOI
  40. Artioli, 2016, It is time to ban rapid weight loss from combat sports, Sports Med, 6, 1579, 10.1007/s40279-016-0541-x · DOI
  41. Loenneke, 2011, Validity of the current NCAA minimum weight protocol: a brief review, Ann Nutr Metab, 258, 245, 10.1159/000330574 · DOI
  42. Fernandez-Elias, 2014, Validity of hydration non-invasive indices during the weight-cutting and official weigh-in for Olympic combat sports, PLoS ONE,, 9, 95336, 10.1371/journal.pone.0095336 · DOI
  43. Artioli, 2010, Development, validity and reliability of a questionnaire designed to evaluate rapid weight loss patterns in judo players, Scand J Med Sci Sports, 20, e177, 10.1111/j.1600-0838.2009.00940.x · DOI
  44. Zubac, 2017, Fluid balance and hydration assessment during the weight-stable preparation phase in elite youth boxers, J Sports Sci, 35, 719, 10.1080/02640414.2016.1184302 · DOI
  45. Akerman, 2016, Heat stress and dehydration in adapting for performance: good, bad, both, or neither?, Temperature, 3, 412, 10.1080/23328940.2016.1216255 · DOI
  46. Pettersson, 2014, Hydration status in elite wrestlers, judokas, boxers, and taekwondo athletes on competition day, Int J Sport Nutr Exerc Metab, 24, 267, 10.1123/ijsnem.2013-0100 · DOI · Paper page
  47. Hoffman, 2011, Nutrition and hydration issues for combat sport athletes, Strength Cond J, 33, 10, 10.1519/SSC.0b013e318237247e · DOI
  48. Franchini, 2012, Weight loss in combat sports: physiological, psychological and performance effects, J Int Soc Sports Nutr, 9, 52, 10.1186/1550-2783-9-52 · DOI · Paper page
  49. Shirreffs, 1998, Urine osmolality and conductivity as indices of hydration status in athletes in the heat, Med Sci Sports Exerc, 30, 1598, 10.1097/00005768-199811000-00007 · DOI
  50. Artioli, 2010, Development, validity and reliability of a questionnaire designed to evaluate rapid weight loss patterns in judo players, Scand J Med Sci Sports, 20, e177, 10.1111/j.1600-0838.2009.00940.x · DOI
  51. Singh, 2013, Markers of hydration status in a 3-day trail running event, Clin J Sport Med, 23, 354, 10.1097/JSM.0b013e318286c2c3 · DOI
  52. Cheuvront, 2015, Spot urine concentrations should not used for hydration assessment: a methodology review, Int J Sport Nutr Exerc Metab, 25, 293, 10.1123/ijsnem.2014-0138 · DOI · Paper page
  53. Reljic, 2016, Rapid body mass loss affects erythropoiesis and hemolysis but does not impair aerobic performance in combat athletes, Scand J Med Sci Sports, 26, 507, 10.1111/sms.12485 · DOI
  54. Martin, 2006, Effects of dietary protein intake on indexes of hydration, J Am Diet Assoc, 106, 587, 10.1016/j.jada.2006.01.011 · DOI
  55. Galloway, 2000, The effects of substrate and fluid provision on thermoregulatory and metabolic responses to prolonged exercise in a hot environment, J Sports Sci, 2, 339, 10.1080/026404100402403 · DOI
  56. Gleim, 2000, Exercise and Sport Science
  57. Iwata, 1979, New micro-turbidimetric method for determination of protein in cerebrospinal fluid and urine, Clin Chem, 25, 1317, 10.1093/clinchem/25.7.1317 · DOI
  58. Fernandez-Elias, 2014, Validity of hydration non-invasive indices during the weight-cutting and official weigh-in for Olympic combat sports, PLoS ONE,, 9, 95336, 10.1371/journal.pone.0095336 · DOI
  59. Brown, 2012, Hydration status in adolescent judo athletes before and after training in the heat, Int J Sports Physiol Perform, 7, 39, 10.1123/ijspp.7.1.39 · DOI · Paper page
  60. Zubac, 2017, Fluid balance and hydration assessment during the weight-stable preparation phase in elite youth boxers, J Sports Sci, 35, 719, 10.1080/02640414.2016.1184302 · DOI
  61. Carter, 1982, Physical structure of Olympic athletes, part I: the Montreal Olympic Games anthropological project, 16, 107
  62. Hoffman, 2011, Nutrition and hydration issues for combat sport athletes, Strength Cond J, 33, 10, 10.1519/SSC.0b013e318237247e · DOI
  63. Reljic, 2015, Effects of pre-competitional rapid weight loss on nutrition, vitamin status and oxidative stress in elite boxers, J Sports Sci, 33, 437, 10.1080/02640414.2014.949825 · DOI
  64. Pettersson, 2014, Dietary intake at competition in elite Olympic combat sports, Int J Sport Nutr Exerc Metab, 24, 98, 10.1123/ijsnem.2013-0041 · DOI
  65. Adolph, 1947, Physiology of Man in the Desert
  66. Sawka, 2007, Exercise and fluid replacement, Med Sci Sports Exerc, 39, 377, 10.1249/mss.0b013e31802ca597 · DOI · Paper page
  67. Roemmich, 1997, Weight loss and wrestling training: effects on growth-related hormones, J Appl Physiol, 82, 1760, 10.1152/jappl.1997.82.6.1760 · DOI
  68. Hamouti, 2010, Effects of athletes’ muscle mass on urinary markers of hydration status, Eur J Appl Physiol, 109, 213, 10.1007/s00421-009-1333-x · DOI
  69. Galloway, 2000, The effects of substrate and fluid provision on thermoregulatory and metabolic responses to prolonged exercise in a hot environment, J Sports Sci, 2, 339, 10.1080/026404100402403 · DOI

Cited by

Metadata

Authors
Zubac, D., Cular, D., & Marusic, U.
Venue
International Journal of Sports Physiology and Performance
Publisher
Human Kinetics
Published
2018-03-01
Volume
13
Issue
3
Pages
374-381
ISSN
  • 1555-0265
  • 1555-0273
DOI
10.1123/ijspp.2016-0621
Cited by
11
References
3

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.