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Pseudonephritis is associated with high urinary osmolality and high specific gravity in adolescent soccer players

(2013) PEDIATRIC EXERCISE SCIENCE. 25(3). p.360-369
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Abstract
The study aimed to evaluate the effect of exercise on urine sediment in adolescent soccer players. In 25 15-year-old (range 14.4-15.8 yrs) athletes, urinary protein, osmolality and cytology were analyzed by flow cytometry and automated dipstick analysis before (T-0), during (T-1), and after a match (T-2). All athletes had normal urine analysis and blood pressure at rest, tested before the start of the soccer season. Fifty-eight samples were collected (T-0: 20, T-1: 17, T-2: 21). Proteinuria was present in 20 of 38 samples collected after exercise. Proteinuria was associated with increased urinary osmolality (p < .001) and specific gravity (p < .001). Hyaline and granular casts were present in respectively 8 of 38 and 8 of 38 of the urinary samples after exercise. The presence of casts was associated with urine protein concentration, osmolality, and specific gravity. This was also the case for hematuria (25 of 38) and leucocyturia (9 of 38). Squamous epithelial cells were excreted in equal amounts to white and red blood cells. A notable proportion of adolescent athletes developed sediment abnormalities, which were associated with urinary osmolality and specific gravity.
Keywords
HYDRATION STATUS, ATHLETIC PSEUDONEPHRITIS, RENAL-FUNCTION, EXERCISE, HEMATURIA, DEHYDRATION, COMPETITION, KIDNEY, BLOOD, FLOW

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Chicago
Van Biervliet, Stephanie, Jean Pierre Van Biervliet, KAREL WATTEYNE, Michel Langlois, David Bernard, and Johan Vande Walle. 2013. “Pseudonephritis Is Associated with High Urinary Osmolality and High Specific Gravity in Adolescent Soccer Players.” Pediatric Exercise Science 25 (3): 360–369.
APA
Van Biervliet, Stephanie, Van Biervliet, J. P., WATTEYNE, K., Langlois, M., Bernard, D., & Vande Walle, J. (2013). Pseudonephritis is associated with high urinary osmolality and high specific gravity in adolescent soccer players. PEDIATRIC EXERCISE SCIENCE, 25(3), 360–369.
Vancouver
1.
Van Biervliet S, Van Biervliet JP, WATTEYNE K, Langlois M, Bernard D, Vande Walle J. Pseudonephritis is associated with high urinary osmolality and high specific gravity in adolescent soccer players. PEDIATRIC EXERCISE SCIENCE. 2013;25(3):360–9.
MLA
Van Biervliet, Stephanie, Jean Pierre Van Biervliet, KAREL WATTEYNE, et al. “Pseudonephritis Is Associated with High Urinary Osmolality and High Specific Gravity in Adolescent Soccer Players.” PEDIATRIC EXERCISE SCIENCE 25.3 (2013): 360–369. Print.
@article{4407460,
  abstract     = {The study aimed to evaluate the effect of exercise on urine sediment in adolescent soccer players. In 25 15-year-old (range 14.4-15.8 yrs) athletes, urinary protein, osmolality and cytology were analyzed by flow cytometry and automated dipstick analysis before (T-0), during (T-1), and after a match (T-2). All athletes had normal urine analysis and blood pressure at rest, tested before the start of the soccer season. Fifty-eight samples were collected (T-0: 20, T-1: 17, T-2: 21). Proteinuria was present in 20 of 38 samples collected after exercise. Proteinuria was associated with increased urinary osmolality (p {\textlangle} .001) and specific gravity (p {\textlangle} .001). Hyaline and granular casts were present in respectively 8 of 38 and 8 of 38 of the urinary samples after exercise. The presence of casts was associated with urine protein concentration, osmolality, and specific gravity. This was also the case for hematuria (25 of 38) and leucocyturia (9 of 38). Squamous epithelial cells were excreted in equal amounts to white and red blood cells. A notable proportion of adolescent athletes developed sediment abnormalities, which were associated with urinary osmolality and specific gravity.},
  author       = {Van Biervliet, Stephanie and Van Biervliet, Jean Pierre and WATTEYNE, KAREL and Langlois, Michel and Bernard, David and Vande Walle, Johan},
  issn         = {0899-8493},
  journal      = {PEDIATRIC EXERCISE SCIENCE},
  keyword      = {HYDRATION STATUS,ATHLETIC PSEUDONEPHRITIS,RENAL-FUNCTION,EXERCISE,HEMATURIA,DEHYDRATION,COMPETITION,KIDNEY,BLOOD,FLOW},
  language     = {eng},
  number       = {3},
  pages        = {360--369},
  title        = {Pseudonephritis is associated with high urinary osmolality and high specific gravity in adolescent soccer players},
  volume       = {25},
  year         = {2013},
}

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