CAJ | 학술논문

背景：当前研究肥胖对儿童的影响多限于代谢生理问题，对于骨骼肌肉及运动能力研究较少。 　　目的：比较肥胖儿童与正常儿童膝关节的等速肌力，从肌力方面分析肥胖儿童运动能力下降的原因。 　　方法：招募56名儿童，其中28名肥胖儿童，28名正常儿童。采用CON-TREX等速测试仪测量下肢肌力，采用VICON系统采集运动数据，采用SPSS 19.0统计软件对所有实验数据进行统计学处理。 　　结果与结论：在同一速度下，肥胖儿童的膝关节伸屈绝对峰力矩和平均功率大于正常儿童(P<0.05)，但是相对峰力矩和相对平均功率与正常儿童没有显著区别[除60(°)/s时伸肌群肥胖组显著低于正常组外](P>0.05)。在同一速度下，两组儿童的伸肌群力矩和功率均大于屈肌群(P<0.05)，同时肥胖组儿童在较高速度[120(°)/s]下伸屈肌群绝对峰力矩和绝对平均功率与相对峰力矩和相对平均功率差异均有显著性意义(P<0.05)。两组儿童均表现屈肌在较高速度下力矩大，伸肌在较低速度下力矩大。正常儿童的步频步速快于肥胖儿童，单步时间和步宽显著小于肥胖儿童(P<0.05)。结果显示肥胖儿童绝对肌力大于正常儿童，但相对肌力等于甚至小于正常儿童，同时肥胖儿童步速较慢，步频较低，这可能解释为由于下肢肌力较弱，导致运动能力不足。
배경：당전연구비반대인동적영향다한우대사생리문제，대우골격기육급운동능력연구교소。 　　목적：비교비반인동여정상인동슬관절적등속기력，종기력방면분석비반인동운동능력하강적원인。 　　방법：초모56명인동，기중28명비반인동，28명정상인동。채용CON-TREX등속측시의측량하지기력，채용VICON계통채집운동수거，채용SPSS 19.0통계연건대소유실험수거진행통계학처리。 　　결과여결론：재동일속도하，비반인동적슬관절신굴절대봉력구화평균공솔대우정상인동(P<0.05)，단시상대봉력구화상대평균공솔여정상인동몰유현저구별[제60(°)/s시신기군비반조현저저우정상조외](P>0.05)。재동일속도하，량조인동적신기군력구화공솔균대우굴기군(P<0.05)，동시비반조인동재교고속도[120(°)/s]하신굴기군절대봉력구화절대평균공솔여상대봉력구화상대평균공솔차이균유현저성의의(P<0.05)。량조인동균표현굴기재교고속도하력구대，신기재교저속도하력구대。정상인동적보빈보속쾌우비반인동，단보시간화보관현저소우비반인동(P<0.05)。결과현시비반인동절대기력대우정상인동，단상대기력등우심지소우정상인동，동시비반인동보속교만，보빈교저，저가능해석위유우하지기력교약，도치운동능력불족。
BACKGROUND:The current studies concerning the effect of obesity on children are limited to metabolic physiology, and there is little evidence available on skeletal muscle and motor ability. OBJECTIVE:To compare isokinetic knee muscle strength between obese children and normal children, and analyze the causes of physical performance decline in obese children. METHODS:A total of 56 children were recruited in this study, including 28 obese children and 28 normal children. The isokinetic muscle strength was tested by CON-TREX. The gaits were tested by VICON. The statistical analysis of al the differences between obese children and normal children were measured using SPSS 19.0 software. RESULTS AND CONCLUSION:At the same gait speed, obese children had higher absolute peak torque and average power than normal children (P<0.05), but relative peak torque and relative average power showed no significant difference compared with normal children (P>0.05) except extensor group at 60(°)/s was significantly lower than normal children. At the same gait speed, the torque and power of extensor group were significantly higher than that of flexor group in the two groups (P<0.05);he obese children showed significant differences in the absolute peak torque and absolute average power compared with relative peak torque and relative average power of flexor group at 120(°)/s (P<0.05). In the two groups, the extensor exhibited higher torque in high speed, while the high flexor torque was found in low speed. Normal children had faster cadence and walking speed, significantly smal er step width and shorter stride time than obese children (P<0.05). Obese children have smal er relative strength and higher absolute strength than normal children;in addition, the low cadence and walking speed are found in obese children. These factors contribute to weak limb strength and insufficient motor ability.