Laboratory Assessment of Choice between Exercise or Sedentary Behaviors

The purpose of this study was to compare cardiovascular fitness between obese and nonobese children. Based on body mass index, 118 were classified as obese (boys OB] = 62, girls OG] = 56), while 421 were nonobese (boys NOB] = 196, girls NOG] = 225). Cardiovascular fitness was determined by a 1-mile 1.6 km] run/walk (MRW) and estimated peak oxygen uptake (VO₂peak) and analyzed using two-way analyses of variance (Gender x Obese/Nonobese). MRW times were significantly faster (p < .05) for the NOB (10 min 34 s) compared to the OB (13 min 8 s) and the NOG (13 min 15 s.) compared to the OG (14 min 44 s.). Predicted VO₂peak values (mL·kg^-1·min^-1) were significantly higher (p < .05) for the NOB (48.29) compared to the OB (41.56) and the NOG (45.99) compared to the OG (42.13). MRW was compared between obese and nonobese participants on the President's Challenge (2005), the National Children and Youth Fitness Study, and FITNESSGRAM® HFZ standards. The nonobese boys and girls scored higher on all three, exhibiting better cardiovascular fitness as compared to obese counterparts.