Long Term Effects of Exercise on Waist-Hip Ratio, BMI, HbA1c

An, Keun Hee; Han, Kyung Ah; Min, Kyung Wan

Abstract

BACKGROUND: Korean Diabetes Association recommends exercise over than 3 times per week. But the compliance is poor and researches about physical activity of Korean type 2 diabetics are limited. The purpose of this study were to investigate the effectiveness of self report methods on the adherence to physical training and the long term effects of exercise on waist hip ratio, BMI and HbA1c.
METHODS
The subjects were trained to exercise over 3 times per week with the load of anaerobic threshold(AT). During 1 year 7 times follow up education were carried out with self -report exercise diary by exercise physiologist bimonthly. The subjects were divided into 3 groups according to duration of exercise : Exercise group(> or =12 months), new exercise group(> or =6 months) control group(<6 months).
RESULTS
The subjects were total 27 patients (male 13, female 14). Mean age was 52.4 +/- 7.4 and the duration of DM was 4.0 +/- 3.7 yea rand mean BMI was 25.5 +/- 3.9 year. There were no differences in ratio of BMI after exercise training among groups. Waist hip ratio increased in all groups but the ratio of change in waist hip ratio was significantly lower in exercise group than in control group. The ratio of change in BMI was positively correlated with the ratio of change in muscle mass and percent fat. But the ratio of change in percent fat(r=0.835) was more prominent than in muscle mass(r=0.686). The Mets of peak exercise was significantly increased in all groups.
CONCLUSION
The physical training using the self-report method was effective in promoting physical activity. The effects of physical training were detected earlier in the change of waist hip ratio than in BMI change. Exercise capacity was increased not only by exercise training but also metabolic control .