Introduction: Currently, due to the high prevalence of overweight, obesity and modernization of life, walking on a treadmill is welcomed instead of walking on the ground. The aim of the study was to compare the effects of treadmill and ground walking, on abdominal obesity and resting heart rate among inactive overweight womenin Boroujerd.
 
Materials & methods: This semi-experimental study was conducted on 30 healthy, inactive, overweight andabdominalobesity womenthatvolunteered to take part in this study in2014. After performing a pre-test,the participants were randomly allocated into three equal groups(n=10): Walkingon theground,walking on a Treadmill, and the control. The walking training program was performed three sessionsper week for eight weeks with60%to85% of heart rate reserve.To compare the effectof trainingprogram,before and after eight weeks, the resting heart rate and the abdominal obesity were detected using Polar device and WHO classification, respectively.The data were analyzed by ANOVA and SPSS19.
 
Findings: The results showed a significant decrease in resting heart rate inwalking on the treadmill and ground, respectively (72.3±2.90,75.3±1.94)afterthe trainingprogram (p<0.05).Butthe abdominal obesity showed a significant decrease single in walkingonthe ground(p<0.05). There was a significant difference in resting heart rate( 75.46±3.37) among the three groupswhilethere was no significant difference in abdominal obesity among the groupsafterthe training program(p<0.05).

Discussion & conclusions: These results indicated that bothtreadmill and ground walkingcan improvetheabdominal obesityand resting heart rate.Walking on ground can promote abdominal obesity than walking on treadmill, so to reduce problems caused obesity and overweight mustbe more emphasis on walking on the ground.