16주간의 복합운동이 제2형 당뇨병 노인 여성의 인슐린 저항성, 염증 지표, 산화 스트레스 및 백혈구 텔로미어 길이에 미치는 영향
Effects of 16 weeks’ combined exercise on insulin resistance, inflammatory markers, oxidative stress, and leukocyte telomere length in elderly women with type 2 DM
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초록
[목적] 이 연구에서는 16주간의 복합운동이 제2형 당뇨병 노인 여성의 인슐린 저항성 지표, 염증 지표, 산화 스트레스 지표, 백혈구 텔로미어 길이, 그리고 신체구성과 일상생활체력에 미치는 영향을 규명하고자 하였다. [방법] 이 연구의 대상자는 제2형 당뇨병 노인 여성 28명으로서, 운동집단의 대상자 14명은 16주간, 주 3회, 회당 60분간 복합운동 프로그램에 참여한 반면, 통제집단의 대상자 14명은 동일한 처치 기간 동안 특별한 처치 없이 평소의 생활습관을 유지하도록 하였다. 처치 전과 후에 인슐린 저항성 지표, 염증 지표, 산화 스트레스 지표, 백혈구 텔로미어 길이, 그리고 신체구성과 일상생활체력을 측정한 다음, 반복 이원변량분석을 이용하여 두 집단 간, 그리고 두 검사 간에 비교하였다. [결과] 이 연구에서 얻은 주요결과는 다음과 같다. 1) 인슐린 저항성과 관련하여, 공복 인슐린과 HOMA-IR에서 집단과 검사의 상호작용이 유의하게 나타났다. 공복 인슐린과 HOMA-IR이 운동집단에서 감소되는 경향을 보인 반면, 통제집단에서 유의하게 증가되었다. 2) 염증 지표와 관련하여, IL-6, TNF-α, 그리고 hs-CRP가 운동집단에서 감소되었으나 통계적으로 유의한 변화는 나타나지 않았다. 3) 산화 스트레스와 관련하여, 운동집단과 통제집단 모두에서 MDA가 유의하게 증가되고 GPx가 유의하게 감소되어 운동 트레이닝의 효과가 없었다고 해석된다. 4) 백혈구 텔로미어 길이가 운동집단에서 유의하게 증가되었다. 5) 신체구성과 관련하여, 제지방량, 체지방량, 그리고 체지방률에서 집단과 검사의 상호작용이 유의하게 나타났다. 제지방량은 운동집단에서 증가되었고, 체지방량과 체지방률은 운동집단에서 유의하게 감소되었다. 6) 일상생활체력과 관련하여, 상완굴신력, 앉았다일어서기, 앉아윗몸앞으로굽히기, tandem test, 10m 빠르게걷기, 그리고 up & go에서 집단과 검사의 상호작용이 유의하게 나타났다. 상완굴신력, 앉았다일어서기, 눈뜨고외발서기, 기능적뻗기, tandem test, 그리고 10m 빠르게걷기가 운동집단에서 유의하게 향상되었다. [결론] 이 연구에서 실시한 16주간의 복합운동에 따라 제2형 당뇨병 노인 여성의 인슐린 저항성이 개선되었고, 백혈구 텔로미어 길이가 증가되었으며, 신체구성이 개선되고 일상생활체력이 향상되었다고 결론지을 수 있다. 규칙적인 운동이 당뇨병 환자의 당뇨 증상과 비만도를 개선시키고 체력을 향상시키는 것은 물론 수명의 연장에도 기여할 가능성이 있다는 것을 확인하였다. 당뇨병 환자를 대상으로 운동 트레이닝을 통하여 백혈구 텔로미어 길이가 증가되는 기전을 규명하는 후속 연구가 요청된다.
Abstract
[Purpose] The purpose of this study was to examine the effects of 16 weeks’ combined exercise training on insulin resistance, inflammatory markers, oxidative stress, leukocyte telomere length, body composition, and daily living fitness in elderly women with type 2 diabetes mellitus (DM). [Methods] Twenty-eight participants were randomly assigned into one of two groups, i.e., exercise training group (EX: n=14) and control group (CON: n=14). Subjects in EX participated in 3 sessions of 60 min-combined exercise for 16 weeks, whereas subjects in CON were asked to maintain their normal life pattern during the same period. The variables regarding insulin resistance, inflammatory markers, oxidative stress, leukocyte telomere length, body composition, and daily living fitness were measured and compared between two groups as well as between pre-post test utilizing a repeated two-way ANOVA. [Results] Main results were as follows: 1) Fasting plasma insulin and HOMA-IR tended to decrease in EX, whereas increased significantly in CON. 2) IL-6, TNF-α, hs-CRP decreased in EX, but the changes were not statistically significant. 3) MDA increased significantly and GPx decreased significantly in both EX and CON. 4) Leukocyte telomere length increased significantly in EX. 5) Fat-free mass increased in EX, whereas fat mass and percent body fat decreased significantly in EX. 6) Arm curl, chair stand, sit & reach, tandem test, 10m walking speed, and up & go improved significantly in EX. [Conclusion] It was concluded that the combined exercise for 16 weeks had a positive effect on improving insulin resistance, increasing leukocyte telomere length, as well as enhancing body composition and daily living fitness in elderly women with type 2 diabetes.
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