Influence of physical activity on hydration state in children with obesity before and after a weight loss program. Issue 4 (4th July 2019)

• Record Type: Journal Article
• Authors: Baert, Judith; Van Biervliet, Stephanie; Van Biervliet, Jean-Pierre; Vande Walle, Johan; Bentin, Felicia; De Graeve, Liesl; Vandenbossche, Doris; De Guchtenaere, Ann
• Is Part Of: Acta clinica belgica. Volume 74:Issue 4(2019)
• Page Start: 236
• Page End: 241
• Publication Date: 2019-07-04
• Subjects: Obesity -- sport -- renin-angiotensin aldosterone system -- dehydration -- residential slimming program; Clinical medicine -- Periodicals; Diagnosis, Laboratory -- Periodicals; 616.005
• DOI: 10.1080/17843286.2018.1493167
• Languages: English
• ISSNs: 1784-3286

Abstract

ABSTRACT: Objective : Evaluate the effect of a 1-year standardized residential slimming program on exercise-induced dehydration in children with obesity. Method : At the start ( T 1 ) and end ( T 2 ) of the program, urine samples, weight, blood pressure and pulse were collected before ( T R ) and after a Cooper test ( T E ). Urinary samples were analyzed for volume, Na (UNa ), Cl, K (UK ), urea, creatinine (Ucreat ), protein and osmolality (Uosm ). Results : All 66 children (15 ± 1 years) starting the program were included after informed consent (28 stopped prematurely). The Cooper test induced a significant weight loss at each test moment ( p < 0.01). The resting UK /(UNa + UK ) % increased significantly from 40 (±11) at T 1 to 50% (±11) at T 2 . Only in normal weight patients, exercise induced a significant increase in UK /(UNa + UK ) % ( T 2 R : 49 ± 11; T 2 E : 56 ± 12) ( p < 0.01) as well as an increase in UNa /Ucreat mmol/mg ( T 2 R : 0.12 ± 0.07; T 2 E : 0.1 ± 0.05) ( p < 0.05). Conclusion : The significant weight loss after exercise indicated significant dehydration. In patients with obesity, no aldosterone effect measured by UK /(UNa + UK )% was observed in contrast to the normal body mass index patients after the program.