水中运动对肥胖中学男生脂代谢身体成分和外周鸢尾素水平的影响

Effects of aquatic exercise on lipid metabolism,body composition and peripheral blood Irisin level in obese middle school boys

目的 探讨8周水中运动对肥胖初中生脂代谢、身体成分和外周血鸢尾素(Irisin)水平的影响,为肥胖儿童青少年的运动减肥提供实践参考。方法 招募参加江苏省如东县暑期青少年游泳(减肥)夏令营的26名男生,分为非肥胖组(12名)和肥胖组(14名)。8周水中运动干预前后测量被试的身体成分、脂质代谢指标和血清Irisin质量体积浓度,采用t检验进行统计学分析。结果 干预后,肥胖组初中生的体重、体质量指数(BMI)、脂肪质量(FM)和体脂百分数(BF%)分别由(77.31±8.26)kg、(28.02±1.67)kg/m2、(25.16±3.59)kg和(32.65±3.90)%下降至(72.37±7.19)kg、(26.15±1.21)kg/m2、(21.71±2.66)kg和(30.14±3.61)%,肌肉质量(MM)由(25.09±3.41)kg增加至(26.76±3.55)kg;TC、TG和LDL-C浓度分别由(4.69±0.48,1.31±0.26,2.74±0.42)mmol/L下降到(4.28±0.42,1.14±0.14,2.36±0.36)mmol/L,HDL-C由(1.34±0.12)mmol/L上升到(1.47±0.11)mmol/L;血清Irisin质量体积浓度由(192.17±23.27)ng/mL下降到(164.15±21.69)ng/mL。干预前肥胖组被试者的血清Irisin质量体积浓度与BMI、FM和BF%均呈正相关(r值分别为0.68,0.87,0.64),与血脂代谢指标TC、TG和LDL-C呈正相关(r值分别为0.61,0.86,0.85),与HDL-C呈负相关(r=-0.63);干预前后肥胖初中生的血清Irisin质量体积浓度差值与BMI和FM的差值呈正相关(r值分别为0.58和0.53)(P值均<0.05)。结论 肥胖初中生可能存在Irisin抵抗,且8周的水中运动可以降低肥胖初中生的脂代谢、身体成分和血清Irisin水平。有条件的肥胖儿童青少年可将水中运动作为合理控制体重、改善脂代谢的干预措施。

Objective To explore effects of aquatic exercise on lipid metabolism,body composition and peripheral blood Irisin level in obese middle school students,so as to provide reference for exercise and weight loss practice of obese children and adolescents.Methods Twenty-six male students,recruited to participate in the summer youth swimming(weight loss)camp in Rudong County Jiangsu Province,were divided into non-obese(n=12)and obese(n=14)group.And t-test method was applied for a statistical analysis of their ipid metabolism,body composition and peripheral blood irisin level before and after 8-week aquatic exercise.Results The high density lipoprotein cholesferol(HDL-C)in the obese group was significantly lower than non-obese group,which were(1.34±0.12)mmol/L and(1.51±0.21)ng/mL,respectively,and the differences were of statistical significance(t=2.81,6.39,8.96,12.69,-2.72,P<0.05).After intervention,body weight,body mass index(BMI),fat mass(FM),body fat percentage(BF%)of obese male middle school students decreased from(77.31±8.26)kg,(28.02±1.67)kg/m^(2),(25.16±3.59)kg and(32.65±3.90)% to(72.37±7.19)kg,(26.15±1.21)kg/m2,(21.71±2.66)kg and(30.14±3.61)%,muscle mass(MM)increased from(25.09±3.41)kg to(26.76±3.55)kg.TC,TG,LDL-C contents decreased from(4.69±0.48,1.31±0.26,2.74±0.42)mmol/L to(4.28±0.42,1.14±0.14,2.36±0.36)mmol/L,HDL-C increased from(1.34±0.12)mmol/L to(1.47±0.11)mmol/L,and serum Irisin concentrations lowered from(192.17±23.27)ng/mL to(164.15±21.69)ng/mL of obese male middle school students.Serum Irisin concentrations of the obese positively related to BMI(r=0.68),FM(r=0.87)and BF(r=0.64),as well as TC(r=0.61),TG(r=0.86),LDL-C(r=0.85),but negatively associated with HDL-C(r=-0.63).A positive relations existed between different value of serum Irisin concentrations and BMI,FM before and after intervention of obese students(r=0.58,0.53)(P<0.05).Conclusion Obese middle school students may be resistant to Irisin.8 weeks of aquatic exercise can improve fat metabolism,body composition and serum Irisin levels of obese junior middle school students effectively.The qualified obese children and adolescents can use aquatic exercise as an intervention measure to control body weight reasonably and improve lipid metabolism.