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Kwon, Han, Ku, Ahn, Koo, and Min: Relationship of Maximal Muscle Strength with Body Mass Index and Aerobics Capacity in Type 2 Diabetic Patients
Original Article
Korean Diabetes Journal

Korean Diabetes Journal 2009; 33(6): 511-517.

Published online: 31 December 2009

DOI: https://doi.org/10.4093/kdj.2009.33.6.511

Relationship of Maximal Muscle Strength with Body Mass Index and Aerobics Capacity in Type 2 Diabetic Patients

Hwi Ryun Kwon1, Kyung Ah Han2, Yun Hyi Ku2, Hee Jung Ahn1, Bo Kyung Koo3, Kyung Wan Min2

1Diabetes Center, Eulji Hospital, Seoul, Korea.

2Department of Internal Medicine, Eulji University College of Medicine, Daejeon, Korea.

3Department of Internal Medicine, Seoul University College of Medicine, Seoul, Korea.

Corresponding author (minyungwa@yahoo.co.kr)

Received 2 September 2009       Accepted 3 December 2009

Copyright © 2009 Korean Diabetes Association

Abstract

Background

Combination fitness regimens (including aerobic and resistance exercises) are effective for improving cardio-respiratory fitness, reducing visceral fat and increasing insulin sensitivity in diabetic patients. The combination exercise intensity that a patient is capable of is limited by his or her aerobic capacity and one repetition maximum (1RM). We investigated the relationships between 1RM, aerobic exercise capacity and body mass index in patients with type 2 diabetes.

Methods

A total of 177 (men: 85, women: 92) diabetic subjects with HbA1c ≤ 10% were enrolled. Muscle strength and 1RM were assessed bychest press (upper body) and leg press (lower body). We assessed aerobic capacity by VO2max and muscle mass by bioimpedance analysis.

Results

There was no correlation between 1RM and VO2max in type 2 diabetic patients (upper: P = 0.122, lower: P = 0.138 for men, and upper: P = 0.952, lower: P = 0.570 for women). However, 1RM was significantly correlated with muscle mass both in men and women (upper: r = 0.493, P < 0.001, r = 0.315, P = 0.002 lower: r = 0.437 P < 0.001, r = 0.307, P =0.003, respectively). There was also a significant correlation between 1RM and BMI. In obese male subjects with BMI ≥ 25 kg/m2, we observed a significant correlation between muscle mass and BMI (r = 0.374, P = 0.032), but this correlation was not observed in women.

Conclusion

Clinicians treating Korean type 2 diabetic subjects should recommend resistance exercise to their patients. In particular, obese women with diabetes may receive greater benefits by increasing muscle mass through resistance exercises.

Keywords: Aerobic exercise, Diabetes mellitus, Muscle strength, Resistance training, Type 2 diabetes

Figures and Tables

Fig. 1
Correlations between 1RM and muscle mass. A. Men. B. Women. 1RM, one repetition maximum.
kdj-33-511-g001
Fig. 2
Correlations between muscle mass and BMI. A. Men. B. Women. BMI, body mass index.
kdj-33-511-g002
Table 1
The clinical characteristics of the subject
kdj-33-511-i001

Data are means ± SD. BMI, body mass index; HbA1c, hemoglobin A1c; HDL, high-density lipoprotein cholesterol; LDL, low-density lipoprotein cholesterol; 1RM, one repetition maximum.

Table 2
Correlations between 1RM, diabetes duration and HbA1c
kdj-33-511-i002

1RM, one repetition maximum; HbA1c, hemoglobin A1c.

Table 3
Correlations between 1RM, aerobics capacity and BMI
kdj-33-511-i003

BMI, body mass index; 1RM, one repetition maximum.

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