TY - JOUR
T1 - Changes in serum hypoxanthine levels by exercise in obese subjects
AU - Saiki, S.
AU - Sato, T.
AU - Kozuki, Masahiro
AU - Kamimoto, M.
AU - Yosida, T.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - 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.
AB - 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.
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U2 - 10.1053/meta.2001.24197
DO - 10.1053/meta.2001.24197
M3 - Article
C2 - 11398135
AN - SCOPUS:0034966877
VL - 50
SP - 627
EP - 630
JO - Metabolism: Clinical and Experimental
JF - Metabolism: Clinical and Experimental
SN - 0026-0495
IS - 6
ER -