title: Effects and mechanism of moderate aerobic exercise on impaired fasting glucose improvement.
abstract: BACKGROUND
  Exercise is beneficial for blood glucose metabolism. However, whether moderate aerobic exercise could improve impaired fasting glucose is unknown. And the mechanism is also needed to investigate.
  
  
  METHODS
  A cross-sectional research was performed and 120 participants with impaired fasting glucose (IFG) were randomly assigned into active and controlled groups. Briefly, participants in active group were required to take moderate aerobic exercise at least 30 min for five times per week, whereas in controlled group, participants were also advised to take exercise but not mandatorily required the same degree as that of active group. At baseline and 3 month's follow-up, laboratory and demographic variables were compared.
  
  
  RESULTS
  At baseline, no significant between-group differences were observed. Generally, leukocyte ROCK2 activity in the active and controlled groups were 58.7 ± 6.0 mg/mL and 60.2 ± 7.3 mg/mL, and daily average exercise time at baseline in both groups was extremely little, with 5.2 ± 3.8 min and 5.9 ± 3.5 min, respectively. After 3 months' follow-up, 52 and 56 participants in the active and controlled groups completed the whole program. Compared to baseline, leukocyte ROCK2 activity and daily average exercise time were improved in both groups. Nonetheless, compared to the controlled group, leukocyte ROCK2 activity was reduced more profoundly and the daily average exercise time was longer in the active group (37.5 ± 6.3 min versus 18.3 ± 7.2 min, p < 0.05). Moreover, the percentage of IFG in the active group was decreased more prominently than the controlled group (76.9% versus 82.1%, p < 0.05). Multivariate regression analyses revealed that exercise time and leukocyte ROCK2 activity was significantly associated with IFG, with OR of 0.836 (active group versus controlled group, 95% CI 0.825-0.852, p < 0.05) in exercise time, and 1.043 (controlled group versus active group, 95% CI 1.021-1.069, p < 0.05) in leukocyte ROCK2 activity. In addition, exercise time was significantly associated with leukocyte ROCK2 activity, with OR of 0.822 (active group versus controlled group, 95% CI 0.818-0.843, p < 0.05).
  
  
  CONCLUSIONS
  In subjects with IFG, increased daily average exercise time is beneficial for improving fasting blood glucose metabolism, and the mechanism may be associated with its effects on attenuating leukocyte ROCK2 activity.
authors.affiliation: Department of Cardiology, the 3rd People's Hospital, Huizhou, 516000, China. liaohuocheng@126.com.
authors.forename: Huo-cheng
authors.initials: HC
authors.lastname: Liao
authors.affiliation: Department of Cardiology, the 3rd People's Hospital, Huizhou, 516000, China.
authors.forename: Si-gan
authors.initials: SG
authors.lastname: Zhong
authors.affiliation: Department of Internal Medicine, Guangzhou Hospital, Guangzhou, 510080, China. lipengcardiology@163.com.
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.affiliation: Department of Internal Medicine, Guangzhou Hospital, Guangzhou, 510080, China. cwb137@yeah.net.
authors.forename: Wei-bin
authors.initials: WB
authors.lastname: Chen
authors.affiliation: Department of Internal Medicine, Guangzhou Hospital, Guangzhou, 510080, China. chengorange2@sina.com.
authors.forename: Cheng
authors.initials: C
authors.lastname: Cheng
authors.affiliation: Department of Internal Medicine, Guangzhou Hospital, Guangzhou, 510080, China. wangyg188@sina.com.
authors.forename: Yue-gang
authors.initials: YG
authors.lastname: Wang
authors.affiliation: Department of Internal Medicine, Guangzhou Hospital, Guangzhou, 510080, China. pingshengwu@sina.com.
authors.forename: Ping-sheng
authors.initials: PS
authors.lastname: Wu
authors.affiliation: Department of Cardiology, the 3rd People's Hospital, Huizhou, 516000, China. huizhouxc@yeah.net.
authors.forename: Chun
authors.initials: C
authors.lastname: Xiao
mesh_terms: D000328:Adult; D001786:Blood Glucose; D003430:Cross-Sectional Studies; D015444:Exercise; D005081:Exercise Therapy; D005260:Female; D006801:Humans; D006943:Hyperglycemia / Q000097:blood / Q000628:therapy*; D007962:Leukocytes / Q000201:enzymology; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D054460:rho-Associated Kinases / Q000378:metabolism
chemical_list: D001786:Blood Glucose; C515852:ROCK2 protein, human; D054460:rho-Associated Kinases