Changes in serum hypoxanthine levels by exercise in obese subjects

S. Saiki, T. Sato, Masahiro Kozuki, M. Kamimoto, T. Yosida

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

To study on effect of obesity on changes in serum hypoxanthine with exercise, exercise stress testing with treadmill was performed on 7 obese subjects (body mass index [BMI], 30.6 ± 3.2 kg/m2) and 16 healthy volunteers (BMI, 21.5 ± 2.10 kg/m2). Expiratory gas analysis during exercise showed that peak Vo2 was significantly lower in the obese group than in the control group (28.1 ± 4.0 v 37.1 ± 4.7 mL/kg/min; P <.001). Furthermore, the obese group had lower anaerobic threshold (AT) values (P <.005), respiratory quotient at AT (P =.003), and exercise capacity reserve (P =.002) than the control group. Baseline serum hypoxanthine levels were significantly higher in the obese group than in the control group (3.46 ± 3.70 v 1.23 ± 1.16 μmol/L; P <.05). Exercise induced a pronounced increase in serum hypoxanthine level in the obese group compared with the control group (10.65 ± 6.81 v 43.86 ± 4.56 μmol/L; P <.01). Serum levels of uric acid before and after load were also higher in the obese group than in the control group (404 ± 43 v 302 ± 77 μmol/L; P <.005). A pronounced increase in hypoxanthine with exercise may result in organ damage caused by free radicals, and intermittent training from mild intensity may be less hazardous for exercise treatment of obesity.

Original languageEnglish
Pages (from-to)627-630
Number of pages4
JournalMetabolism: Clinical and Experimental
Volume50
Issue number6
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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