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

제2형 당뇨병환자에서 최대근력과 유산소 운동능력 및 비만도의 관련성

Kwon, Hwi-Ryun;Han, Kyung-Ah;Ku, Yun-Hyi;Ahn, Hee-Jung;Koo, Bo-Kyung;Min, Kyung-Wan
권휘련;한경아;구윤희;안희정;구보경;민경완

  • Published : 20091200

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 ${\leq}$ 10% were enrolled. Muscle strength and 1RM were assessed bychest press (upper body) and leg press (lower body). We assessed aerobic capacity by $VO_{2}max$ and muscle mass by bioimpedance analysis. Results: There was no correlation between 1RM and $VO_{2}max$ 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: $\gamma$ = 0.493, P < 0.001, $\gamma$ = 0.315, P = 0.002 lower: $\gamma$ = 0.437 P < 0.001, $\gamma$ = 0.307, P =0.003, respectively). There was also a significant correlation between 1RM and BMI. In obese male subjects with BMI ${\geq}$ 25 kg/$m^2$, we observed a significant correlation between muscle mass and BMI ($\gamma$ = 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.

연구배경: 당뇨병환자에서 유산소 운동과 근력 운동을 병행하면 심폐기능 향상, 복부지방 감소, 혈당 강하, 인슐린 감수성 증가 등의 이점이 있다. 복합 운동을 시행할 때 유산소 운동능력 및 최대근력이 운동 강도 설정의 기본이 된다. 본 연구에서는 당뇨병환자에서 최대근력과 유산소 운동능력 및 비만도와의 상관성을 알아보고자 하였다. 방법: 총 177명(남: 85, 여: 92)의 당화혈색소 10% 이하의 제2형 당뇨병환자를 대상으로 하였다. 상체는 chest press, 하체는 leg press로 최대근력(Keiser)을 측정하였고, $VO_{2}max$ (ER900; Jager)를 이용하여 유산소 운동 능력을, 체성분분석(Inbody 3.0)을 통해 근육량을 측정하였다. 결과: 제2형 당뇨병환자에서 최대근력과 최대산소섭취량은 유의한 상관관계가 없었다(남자: 상·하O지각O각P = 0.122, P = 0.138, 여자: 상·하지각각P = 0.952, P = 0.570). 최대근력과 근육량과 유의한 상관관계가 있었다(남자: 상지$\gamma$ = 0.493, P < 0.001, 하지$\gamma$ = 0.437 P < 0.001; 여자: 상지$\gamma$ = 0.315, P = 0.002, 하지$\gamma$ = 0.307, P = 0.003). 체질량지수와 근육량은 유의한 상관관계가 있었다. 그러나 체질량지수 25 kg/$m^{2}$ 이상인 비만인 환자의 경우 남자는 근육량과 체질량지수가 유의한 상관관계에 있었으나($\gamma$ = 0.374, P = 0.032) 여자는 유의한 상관성이 없었다($\gamma$ = 0.249, P = 0.169). 결론: 우리나라 제2형 당뇨병환자의 경우 일반인에 비해 저항운동이 더욱 필요하며, 특히 비만한 여자 환자들은 근육량을 늘리기 위한 복합운동이 필수적이라 하겠다.

Keywords

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