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운동생리학 : 장기간 트레드밀 운동이 고지방식이 쥐의 혈중 지질성분과 렙틴농도에 미치는 영향
이희혁(HeeHyukLee),오명진(MyungJinOh),민대식(DaeSikMin),김종오(JongOhKim),박성태(SungTaePark),윤진환(JinHwanYoon),정일규(IlGyuJeong) 한국체육학회 2005 한국체육학회지 Vol.44 No.5
The prevalence of obesity is increasing. Although the etiology of obesity is complex, dietary factors, particularly the consumption of a high-fat diet, is considered a risk factor for its development. Physically activity, in contrast, is an important factor for preventing and treating obesity. The aim of our study was to investigate the effect of treadmill exercise on plasma lipids profile and leptin concentrations in high-fat fed rats. Male Sprague Dawley rats were assigned into four groups: the control group, the normal diet group, the high-fat diet group, and the high-fat diet and exercise group. High-fat diet groups were fed a diet with 45% fat and 30% carbohydrate, while the control groups were fed a diet with 4% fat and 70% carbohydrate. Animals of the exercise groups were made to run on a treadmill 60min, 6 days per week for 6 weeks. At the end of 6 weeks, weight gain, plasma lipids, and leptin was measured. The high-fat diet caused increases in body weight gain, serum triglycerides, LDL, and leptin levels. The exercise attenuated body weight gain, serum cholesterol, triglycerides, LDL, and leptin levels under condition of the high-fat diet as well as the normal diet. Those results indicate that exercise improves plasma lipids and leptin under normal diet and suppresses the high-fat diet-induced increase in leptin levels, suggesting its potential in the treatment of abnormal lipids and leptin changes associated with abnormal lipid metabolism.
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척수손상 후 트레드밀 운동이 손상된 부위에서 BDNF와 trkB mRNA 발현에 미치는 영향
오명진(MyungJinOh),서태범(TaeBeomSeo),김종오(JongOhKim),남궁욱(GungUkNam),정일규(IlGyuJeong) 한국체육학회 2010 한국체육학회지 Vol.49 No.6
이 연구는 척수 손상 초기에 운동이라는 자극을 통해 체내에서 생성되는 BDNF mRNA와 trkB 수용체 발현이 손상부위별로 어떻게 나타나는지 살펴보는데 목적이 있다. 실험동물을 이용하여 손상을 받지 않은 그룹(normal: n=7), 척수손상 그룹(sedentary: n=7) 그리고 척수손상 후 운동그룹(TMT: n=7)으로 분류 하였으며, 손상그룹은 NYU 척수손상장비를 이용하여 흉추 9번을 불완전 타박손상을 가하였다. 1주간의 휴식 후 스트레스를 유발하지 않는 저강도 트레드밀운동을 2주 동안 수행하여, 손상초기에 따른 손상부위별 BDNF와 trkB 발현을 확인하였다. 그 결과 척수손상 후 트레드밀 운동에 의해 손상 조직의 rostral, injury site, caudal 부위 모두 1주와 2주 운동그룹이 비운동그룹 보다 BDNF와 trkB mRNA 발현량이 증가한 것으로 나타났다. 이러한 결과는 손상된 중추신경에서 BDNF 발현이 신경회복에 긍정적 효과를 가지고 있는데, 척수손상 초기 운동을 통해 손상주위 조직 BDNF 발현의 확산을 더욱 증가시킬 수 있는 방법임을 제시하는 바이다. It has been postulated that exercise-induced activation of brain-derived neurotrophic factor(BDNF) may account for improvement of nerve recovery in animals after incomplete spinal cord injury(SCI). Forty five male SD rats (230±10g; 7week in age) were assigned equally to three different groups; normal (n=7), SCI (n=7), SCI+treadmill training (TMT, n=7). Every rat in SCI and SCI+TMT groups underwent laminectomy at T9 level and then contusion on the exposed spinal cord in the anesthetized condition. After 1 week-recovery, exercise was performed by having rat run on a treadmill at a speed of 8-10 meters/min on a horizontal platform for 30min/d, 5d/wk for 2wks. The data was analyzed by using SPSS WIN Ver.14.0, independent t-test. Also statistical level institutes at the .05 level. BDNF and trkB expression levels were analyzed by RT-PCR and increased in rostral and caudal regions as well as injury site of 1-2 weeks exercise groups after spinal cord contusion. These data suggested that exercise-induced increase of BDNF may play a role in facilitating recovery of locomotion following spinal cord injury.
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