高强度间歇训练对青年肥胖女性腹部脂肪含量的影响

Effects of High-intensity Interval Training and Continuous Training on Abdominal Fat in Obese Young Women

目的：比较高强度间歇训练和中强度持续训练对青年肥胖女性腹部内脏和皮下脂肪含量的影响。方法：24名青年肥胖女性随机分为两组分别进行12周（4天/周）高强度间歇训练和中强度持续训练干预。高强度间歇训练组在跑台上以85%～95%最大心率（HRpeak）运动4分钟接50%～60%HRpeak运动3分钟后休息7分钟,重复4组;中强度持续训练组以60%～70%HRpeak持续运动33分钟。两组均以50%～60%HRpeak强度热身10分钟、整理活动5分钟。干预期间,受试者保持惯有的饮食和活动习惯。干预前后分别用计算机X线断层扫描测量腹部内脏和皮下脂肪面积、生物电阻抗法测试体脂百分比（fat%）。结果：干预前两组所有指标差异均无统计学意义。12周干预后,两组体重（高强度间歇训练：61.23±8.39 vs 66.37±9.34 kg;中强度持续训练：60.28±5.78 vs 64.81±6.10 kg,P〈0.01）和fat%（高强度间歇训练：28.18%±3.93%vs 31.30%±3.63%;中强度持续训练：29.21%±2.43%vs 32.01%±2.41%,P〈0.01）均较干预前显著下降,但下降幅度两组间差异无统计学意义;高强度间歇训练组腹部内脏脂肪面积较干预前显著下降（53.12±14.51 vs 64.86±17.46 cm2,P〈0.01）,中强度持续训练组干预前后差异无统计学意义（55.55±14.94 vs 60.41±15.45 cm2,P〉0.05）;两组腹部皮下脂肪面积均较干预前减少（高强度间歇训练：205.57±68.25 vs 255.29±77.38 cm2;中强度持续训练：204.02±55.74 vs 229.44±57.36 cm2,均P〈0.01）,但高强度间歇训练组减少幅度显著大于中强度持续训练组。结论：高强度间歇训练可以降低青年肥胖女性腹部内脏脂肪含量,而相同耗能量的中强度持续训练却无此效果;高强度间歇训练与中强度持续训练均可减少腹部皮下脂肪,但前者效果更明显;高强度间歇训练与中强度持续训练均可降低fat%,效果无显著性差异。

Purpose To compare the changes in abdominal visceral fat areas（AVFA）and abdominal subcutaneous fat areas（ASFA）in obese women after an interval training（IT）program and a continuous training（CT）program. Methods 24 obese young women were evenly assigned into group IT and group CT. 12-week four 4-minute interval treadmill running（at 85%-95% of peak heart rate）with an interval of 7-minute and continuous 33-minute running at 60%-70% of peak heart rate were respectively given to the two groups,4days per week. All subjects maintained their own diet habit during the entire experiment. CT was used to determine the AVFA and ASFA. Whole-body fat % was assessed by bioelectrical impedance. Results There were no significant differences in all parameters in two groups before the experiment. After training, similar reductions in body weight（66.37 ± 9.34 vs 61.23 ± 8.39 kg in group IT and 64.81 ± 6.10 vs 60.28 ±5.78 kg in group CT, P﹤0.01）and % fat（31.30 ± 3.63 vs 28.18 ± 3.93% in group IT and 32.01 ± 2.41 vs 29.21 ±2.43% in group CT, P ﹤ 0.01）were observed in both groups. After running,reduction of ASFA in group IT（from 255.29 ± 77.38 to 205.57 ± 68.25 cm2）was higher in than group CT（from 229.44 ± 57.36 to 204.02 ±55.74 cm2）（P﹤0.01）. However, AVFA reduction was only found in group IT（from 64.86 ± 17.46 to 53.12 ±14.51 cm2, P﹤0.01）, but not in group CT（60.41 ± 15.45 vs 55.55 ± 14.94 cm2, P﹥0.05）. Conclusions The12-week IT and CT programs with equivalent energy expenditure resulted in similar reductions in % fat of obese young women. Nevertheless, only IT could reduce AVFA, and the reduction of ASFA by IT was greater than CT.