Patkar Kshitija Umesh, Joshi Anjali S
Department of Physiology, Seth G. S. Medical College & KEM Hospital, Parel, Mumbai--400 012.
Indian J Physiol Pharmacol. 2011 Apr-Jun;55(2):188-92.
Incidence of obesity in early life is increasing nowadays because of faulty food habits and lack of exercise. This study was aimed to find out whether obesity affects cardiorespiratory efficiency of young adults. As VO2max is the most accepted indicator of cardiorespiratory efficiency it was compared in 30 obese and 30 non-obese subjects aged around 18-20 years. VO2mx was estimated by Queen's college step test. Various other parameters measured and calculated are weight, height, BMI, skin fold thickness, percentage body fat, lean body mass, fat mass. The results showed that cardiorespiratory efficiency (absolute VO2max & VO2max/kg lean body mass) was not affected (P > 0.05) in obese group in both sexes. Ability to do exhausting work (VO2max/kg body weight) was less in obese group (P = 0.001) compared to non-obese group & in obese males (P < 0.01) as compared to non-obese males. Percentage body fat (r = -0.416), triceps skin fold thickness (r = -0.427) and calf skin fold thickness (r = -0.381) strongly correlate to VO2max/kg body weight. Therefore the exercise programs can be best designed to increase caloric expenditure and thus to decrease body fat rather than to improve aerobic fitness.
由于不良的饮食习惯和缺乏运动，如今早年肥胖的发生率正在上升。本研究旨在探究肥胖是否会影响年轻成年人的心肺效率。由于最大摄氧量（VO2max）是最被认可的心肺效率指标，因此对30名肥胖和30名非肥胖的18 - 20岁左右的受试者进行了比较。最大摄氧量通过女王学院台阶试验进行评估。测量和计算的其他各种参数包括体重、身高、体重指数（BMI）、皮褶厚度、体脂百分比、瘦体重、脂肪量。结果显示，肥胖组男女的心肺效率（绝对VO2max和每千克瘦体重的VO2max）均未受到影响（P > 0.05）。与非肥胖组相比，肥胖组进行高强度工作的能力（每千克体重的VO2max）较低（P = 0.001），与非肥胖男性相比，肥胖男性的该能力更低（P < 0.01）。体脂百分比（r = -0.416）、肱三头肌皮褶厚度（r = -0.427）和小腿皮褶厚度（r = -0.381）与每千克体重的VO2max密切相关。因此，运动计划的最佳设计应是增加热量消耗，从而减少体脂，而非提高有氧适能。
